Close family weddings

Hi all, weve been together since 2009 and our church wedding was originally booked for 11th July 2020 and was cancelled due to covid, no wedding happened in the church in 2021 and in 2022 thu church floor was lifted for repair, in 2023 they started carrying out weddings with some of the floor repaired and curtains up to hide the rest, our reverend offered us this but we chose to wait, in the mean time my sister got engaged and booked wedding for July 24 (they haven't been together long by this point, under a year) I was slightly annoyed as our wedding has always been planned for July, but I didn't say anything. Now the reverend has contacted ,said floor is done, he cant offer us our July date as he's away but can offer the same weekend (literally say after my sisters) I said that's to close so he's offered 22nd june, so we took it. Now my whole family hates me and are ignoring me!
They knew we were waiting for the floor and knew wedding was originally July, now they are saying they didn't know and I'm a bad person, to top it off my sister has chosen all the colour scheme we had and had already purchased back in 2020, which annoyed me, my mum even told her that was our colour scheme, I just bit my tongue asusual.
My mum said, when I told her the date 'oh I've got a quior concert then, I'm looking forward to it' since then, the sibling what's app group ,I'm pretty sure there was a mocking comment, got deleted before I could read it, but other comments suggest it, I left the group now. And my mum auntie and sister had a conference call in secret. I know it's close ,but also feel like my sister knew 3 years in advance (before she even got with her boyfriend) that we were marrying in July?