Unresponsive Wedding Caterer paid in full

Hi all! I need some advice. My wedding was unfortunately one of the ones affected by covid. It was the week of the shut down (March 20th 2020) and we along everyone thought we would be back up in two weeks.
All vendors were paid the week before our wedding date.
Everyone has been helpful on accommodating the changes. The caterer last responded to us back in august 2020 when we told them we are still undecided on when the wedding will be held but we would keep them posted. Needless to say they were still accommodating and emailed back with they will still work with us once we decide on a date and to let them know at least a month or two in advance when we are rescheduling
We reached out in August to let them know we are rescheduling for March 2021 and it’s now almost end of October they have not replied. I’ve sent them another email, I’ve dm them on Instagram where they have “seen” my message, and I have texted the caterer as well. All have been ignored.
It’s a true wedding nightmare and I’m not sure of how to go about it.
I have email receipts of the payments I’ve done and obviously email paper trail of their responses. I’ve screen shotted the dm where it showed that they read my dm message but didn’t reply. They also posted on on their Instagram advertising events they will be at.
My partner and I are planning on confronting them at one of the events also.
But I wanted to see if anyone had experienced something similar and what did you guys do to rectify it.