Telkom keeps debiting after I cancelled contract within 7 days

I took a Telkom contract in the last week of January, next 2 days fibre was live in our complex, I immediately cancelled the contract with Telkom, and they promised me that they will not debit since I cancelled within 7 days, I said okay, i received SMSes saying they will debit, I went back to the store and explained, they again still said no, they will not debit, on the 25th of last month(25 February 2022) they debited, I reversed the debit order using my capitec cellphone app, meaning bad credit record for me, I went back to them and explained and asked why, they said it was a mistake and they won't debit, so today the 18th March 2022 they debited R1000.70, now I have to go to the bank and ask for a reversal, another bad credit record.

I am about to involve my attorney should this go on, I am fed up.