Account on hold

A deposit was made on 2018 by an unknown person to my cellphone number that is linked to my Capitec account. When I notice the deposit, I personally went to the bank to enquire. I was then told that indeed there is a deposit to my account and the funds belong to a client who informed the bank that she did not make a deposit but her funds where deposited to an unknown person. Personally I was not expecting funds from anyone and I did not know the client. I was then advised by the Capitec Consultant to make an affidavit saying that I do not know the client and funds can be reversed .Affidavit was made, funds were reversed but sad part is that my account has since been on hold, therefore it is like now I stole the money. Please advise