Disappointing customer service

For the pass 2 months the has been transactions that I never authorized on my fnb Cheque account. I logged a dispute with fnb customer Care and the consultant advised me to log a dispute through my banking app, which I did. Ever since I’ve been told they still investigating and my call it’s still within the turn around time and I waited to date still no response but to my Suprise fnb is no longer picking up the dispute logged. Again this month the company tried their luck on my account again. This very bad customer service fnb u need to pull up your socks