Truist restricted my account and took my $1200

I opened a checking account with Truist 6 months ago and set up a direct deposit. Everything was okay till I deposited a paper check for $1200 which was my stimulus check and it went to a restricted account in another bank. I deposited this check before I went to meet my parents and when I reached there my debit card was already locked. I called them several times but there was no answer. I was with zero cash for the whole weekend and the next day I even lost access to online banking and I called them. They told me that Truist has decided to close my account without any solid reason. My money is sitting there and they closed my account. They just don’t care about it, this is illegal. I will surely file a case against Truist bank.