Useless and helpless FNB with the ****med mandated debit order ,call centre and the Branch

i am extremely disappointed with the service i got from FNB digital banking , yesterday i had discovered that i have been ****med my a company called Clear Debt Review which debited my account on the 26th August ,Amount of R2500 then immediately tried to notify my FNB about this and instruct them to dispute or suspend this debit order from debiting my account , iyoo with that frustration was transferred from 1 line to another without any assistance , i even went far as driving to the nearest FNB branch as instructed by their digital consultants but even at the branch FNB STANDERTON did not assist me instead they insisted that i should call again the call Centre consultants to assist but still i was not assisted , i am very much disappoint yes i have been ****med but i want to STOP the debit order from further debiting my account , is that so difficult, NXXAAA