Account Frozen

on Wednesday 23 December 2020 I was at the FNB ATM to withdraw money and found that my account had been frozen, after calling the customer care department and speaking to numerous people I was told that I have to wait for an investigator to contact me as there had been ***** on my account. Nobody could tell me who to speak to or even help me and kept telling me an investigator should call me the same day. We are now 5 days later and no one has contacted me and I also do not have access to my funds in my account. This is totally ridiculous, how am I supposed to survive if FNB just decides to block my account whenever they see fit and not even get in contact with me to inform me or even help me sort it out.