Very confusing

At this point im a very unhappy and confused customer. First i get rob from my phone and bank card and when i went in to the bank i get to know that my account has been placed under investigation for mull activities. And i then asked that he please explain to me. I then asked should i go to the police his answer to me was its not nessesary. But he could not give me a new card or change anything on my account and i was told to just come back frequently to see your out come. This have been more than a month ago and I still have no answers. I have a friend thats been going through the something and he was so rudely told that its best if he finds himself another bank