MIL ruined wedding

Well the title says it all and it will be a little long as I need to get this out of my system.
MIL always been a little hard work but never thought this would happen.
Arrived in northern Ireland- all was well- did bits and pieces, had nails done, etc and everything fine.
Friday morning MIL went with SIL to spa and everyone else finished the cakes and packed up and drove to the hotel.
Politely asked SIL for my dress as she had transported it and she joked she’d dropped it on the motorway and I said “oh well” and I went to the room.
SIL then went to MIL and told her that I asked for my dress rudely and was a complete b*tch (I didn’t know this). By the way SIL is 42yrs old. So this set MIL off and she started being rude and ignoring me. She made my H cry as she was being so rude.
So I took him off and we had a relaxing bath and sit in hot tub and started again.
But MIL and SIL just continued- b*tching, ignoring, being rude to my dad, etc. FIL and H tried to talk to them but nothing. We all decided we would just ignore them as they were just going to continue.
Morning of the wedding I thought it woud be better (no alcohol in their system) but I just got bollocked and ignored while everyone had their hair and make up done.
Ceremony was great but MIL got hump that we hadn’t told her that we were double barrelling our names (we had and FIL confirmed this) so off she went!
So I ignored her and H and I had our photos done w my dad and FIL (they just needed to get away) we went and talked to everyone and was promptly ignored by his family (MIL had got her claws in).
So we just carried on and I have lots of happy memories of spending time with H and friends I hadn’t seen in years.
We decided to go to bed so said our goodbyes including hugs for MIL and SIL. My dad took us over to the side and said he just wanted to warn me that MIL had come over to him and said that she was going to shout at me the next morning for being so rude to everyone and hs just wanted to warn us.
We got back to room and I promptly burst into tears as MIL and SIL had been so awful all day.
Hardly slept but got up early to pack everything and say good byes to people who had to leave early and jump in the spa for a relax.
Found FIL in tears and he asked me to say thank you to MIL and SIL for their help as he had had it all night how I hadn’t done this and been so rude ( I had said thanks when they left after hair and when we went to bed) so I gritted my teeth for my FIL’s sake and gave them both hugs and thanks where his mother promptly told me I was moody my personality had changes yesterday but she didn’t want to bring it up again.
So we left for in laws house where we were staying, unpacked and Mil went to bed and left us all day.
Monday- got up ready to go out to get food and FIL’s internet stuff and MIL sat us all down and stared off- “I didn’t want to have to bring this up but Michelle has been so rude since Friday and I just can’t take it any longer”
At this I’m sorry but I let rip- I wasn’t putting up with this any longer.
MIL ran off so everyone followed and I was dragged up and we were all locked in a room together by my H. Everything came out- the fact that SIL had lied about me being rude (which had basically set it all off) as H, FIL and H’s friend had all been their when I had “been rude and abusive”. And that SIL had apparently been saying far more nastier things that that about me. MIL wouldn’t believe it but she said she was convinced by the end of it and was going to talk to SIL. I told her that she had ruined my wedding that I had spent a year planning and spent all that money on and I would never forgive her for that as we can’t get that back and H agreed.
She went to SIL to talk to her and we all went shopping as planned. We came back and had dinner all together and friends came over with their little one ad then everyone went to bed.
Tuesday- Got up said hello to MIL and sat down to watch TV. Got dressed at 10 and Mil felt unwell so went to bed. We asked her she wanted to go to the beach and to see the photographer but she said no. So H, I and FIL all went off. We came home at 4 and MIL was out so we thought she was shopping and then off to weight watchers and would be back at 7 ish. 7 came and went so we rang her mobile- no answer. Rang SIL- no answer. It started raining so I ran out to bring washing in and in that space of time SIL had rang and given a load of abuse to FIL and H about the fact that Mil hadn’t seen us for the last 2 days which then changed to not since 08.30 this am – we didn’t leave house until 11.30 and we saw her to bed as she didn’t feel well and asked if she wanted tea/food!!!
So H was trying to phone SIL but she caught him off then threw a torrent of abuse down the phone. So FIL and H have gone around to hers to discuss what is going on as MIL and SIL are both feeding each other lies and living in their own world. They came back after 2 hours and MIL apologised saying she didn’t know what was going on. I really don’t agree with this- she is making herself a victim but she has a brain on her shoulders and could have listened to others but no her daughter comes above her husband and son.
My FIL is the most quiet and gentle person going and I feel so sorry that he is stuck in the middle- we get to go home tomorrow but he has to put up with this.
I can’t forgive MIL or SIL for what they did- there was no need to behave that way.