Blocked account

My account was blocked on the 1st of January 2021 I was not even aware until I got to the mall when I was trying to make a payment. I then Made a call to FNB and I was told that my account was blocked because I received money from an account that was implicated in *****. I was then given a case number and the name and number of the person who was responsible for the case Casey Jones. I was told to go to the police station and write an affidavit explaining what the money I received was for. I did exactly that and emailed the affidavit, a few days later I called and was told that the case was closed but there was still a Hold on my account that could only be removed by Ms Jones. I've tried several times to get a hold of her but till today there hasn't been any response. All I want is my money then they can keep their account. Very poor customer service I've recieved from FNB no one is willing to assist me