Disputing unauthorised debit order

I'm very unhappy with FNB - I have an debit order of R129 from "PROCALL BD ********** " that is in contravention of my authority and have tried several times to dispute the transaction both online and on the app and have been getting nothing but notifications that the "the system is currently unavailable." Now for such an amazing bank I don't expect this kind of service, what's even worse is that I tried calling and the phones are engaged as well...I am absolutely losing my mind. What really grates me though is that when I tried disputing on the app - it notified me that the bank may charge me for disputing. Now why should I be charged for a debit that I did not authorize and pay for their negligence on ********** activity???

I saw many people on MyBroadband: https://mybroadband.co.za/forum/threads/r129-procall-vip-debit-order. ********** / complain about this **** and when I saw this transaction go off my acccount and had experience what I am with the bank...it just frustrates me