Data Sim card Cancellation

I have been trying to cancel data sim card with telkom for the past 7 months which the contract agreement ended in March 2024,I am paying for a services I am not getting because everytime I call online or go to the mall of Africa they tell me they can't cancel it due to is not on prepaid they had to log a ticket with IT to solve it.It has been more than 7 months been told the same.They know that their contract affect our credit score and will pay even though we don't receive the benefits. How do they even recognize their revenue while my contract with them has expired and they can't tell me about month to month services because I am mot receiving any benefit. Telkom please cancel my contract. Emotionally and financially I am tired. You can keep my money,I just wanna be out of your system.I have suffered is enough.