Debit order dispute and unsatisfactory customer service.

I have been trying to reverse/dispute an unauthorized debit order on my account for the past 12 months. Because I have a premier account I was told I cannot do this at a branch I need to use the app to contact or speak to the "private bankers". I have been taken from pillar to post, been told to email this person , call that department and no one in the entire bank, or atlest the people I have spoken to, has been able to stop/reverse a monthly unauthorized debit order of R105. This week alone I've spoken to 2 consultants( Nkululeko and Thumeka). Thumeka did not even take the time to assist or understand what I wa trying to tell her, she did not even take the time to understand which debit order I was referring to and she just cut me off, just like that. I am appalled at the customer service I have received from her/him. With the other consultants they tried , although with no success, with her it was a different story, for someone within customer service, the kind of service I received from her was shocking to say the least. Now do I just leave the debit order to go on indefinitely, because we have consultants like Thumeka who are not willing to assist or do I continue calling FNB. This is really frustrating.