Blocked account

My name is Nolizwi Lekena ID number ***, I have an account with the above mentioned bank, my account was blocked on the 30th of June 2023, for no reason known to me as an account holder, I did visited the branch to find out what was going on, I was told that my account was blocked for investigation of *****ulent transaction of which I was not told which transaction is that one and what I must do for my account to be unblocked, I was told to wait for the investigating officer to call me, now it's more than ten working days but they are not contacting me at all, and I'm self employed I use the same account for my business and I'm stuck without any help at all, the most important thing is for them to communicate with me about my account as an account holder.