Frozen Account for over Three years

Three years ago a case of ***** was linked to my bank account, and my account was frozen with my money. I received a call from SAPS for a statement only to be told that I'm not a suspect on the case. Detective who's handling the case told me to go the bank and tell them to release my funds. Bank consultant requested I produce a proof that the money in the account really belong to me. I produced all the required info and yet nothing happened. I made a follow up with them couple a months later only to be told that the person who opened a case requested they should call the cops should I come to the bank again. I advised them to do so, but they didn't. The officer who is handling this matter is never available whenever I call the station. I even visited the nearest police station to see if maybe the police are looking for, if there is a case against me. Trust me there is no case under my name. Kindly help me find my money bank