Not happy

Fnb has been my bank for a very long time,I loved them, for their safety, but now I have a problem, I tried contacting them via secure chat I didn't get any help,they made me wait for more than 4 hours for several occasions and still my problem is not yet resolved, I asked them why are they allowing telkom to debit my account despite me not having any business with telkom neither debicheck, and I am yet to get any help,I want telkom blocked from debeting my account but I am yet to get any help and when that happens I keep getting charged unnecessary 115 for something fnb could have resolved long time ago when I asked for help,they are really really pushing me out of their bank in as much as I love them now telkom tried debiting my account when there is no money now I have to pay charges for something I don't even have debicheck mandate for, how is this fair because all I wanted is them blocked from my account forever