Frozen account *** without telling me

The bank decided to freeze my account without telling me. When l call them, that is when they tell me that my account is investigated. Apparently, an FNB client was reported of *****ulent activities and because someone who received money from that account deposited money to me, then my account is implicated. I was asked to make an affidavit and certified lD copy based on declaring R500 transaction for 27th March. I did that. I waited for positive response. I only received a call saying they gave me wrong transaction. When l went to the nearest branch, they told me another R4900 transaction needed declaration. I did the second affidavit. What is so annoying is that l am the one making follow up, if not, nothing happens. The last time they called, they said my account will not be opened. They even reversed my debit order. I hate the bank and l want my money back.