I don’t feel safe. FNB cannot be trusted

I want to report ***** as there are changes that are happening in my account and when I call the ***** department there is no answer. I called FNB after receiving countless emails that I made changes to my account and the person called Phumzile Mlambo sent a pdf to my email address with changes made. My signature is the one the papers. The person who is misusing my details has used the same details, but different ID number, same work email address as mine. To my surprise this person is based in Cato Ridge KZN but Phumzile Mlambo who assisted is based in the Polokwane branch FNB city. Do I have to wait for my accounts to be dried out completely to be assisted? What the heck!!!!