********** deduction

Cellc company I am. Disappointed with you. I had a contract with you which ended 2022 October. Today a debit of 1900rand was taken from my account. I called the call centre and was told I failed security check. To my understanding this means a customer or internal employee bought a foune with my banking details but changed my personal details. How do you allow a bank proof details different from applicant personal details? What is going to happen to a consultant who authorized the sale? Now I am. Going to be charged dispute fee which I don't have.

What do one do when things are like this