Capitec is robbing me of my money

My account was blocked in 2018 and capitec bank claimed that there were ********** activities happening on my bank account which I told them that there was none. Anyways my account was never unblocked and that didn't really bother me as Capitec was not my main bank, it was my secondary bank. Recently my brother deposited funds into my account by mistake and I was told to provide both an affidavit and proof of payment from my brother which I did to access the funds. Now I'm told that the bank cannot release these funds. They can only release it, if it was a salary or UIF deposited into my account.

Has anyone had a similar problem, how did you resolve it?