TELKOM ROBBING CUSTOMERS

My LTE contract has expired. I was advised to cancel the contract because I no longer require the service. I have a cancelation reference number from 15 Feb 2021 yet Telekom keeps on deducting money from my account. When I come in the store to query, they can't help and say I must phone the contract department. Why isn't this something that can be resolved in store???? When I called the contract department I was advised that the previous consultant did not cancel my contract. I don't understand how that's possible because I have a reference number for a cancelation. Now I must await another cancelation reference and be billed for the cancelation, day light *******!