Fnb *****ulent activity

Fnb is *****ing people money my account was -297 had a payment of 2500 come in than all of a sudden it was -419 tha it went to 1983 which still doesn’t make sense and to make matters worse I never swipe my card if I have no funds and I don’t have any overdraft so please explain where the money is going to as when I swipe the money goes out fnb are *******! That need to be watched