Cancelled mobile data contract

Hi,

I had a mobile data contract no *** with Telkom mobile, Then I decided to cancel the contract because I don't need their service anymore. I went through the procedure of cancelling the contract. I even called them to check and they advised that I am no longer having a contract with them but to my surprise they keep on debiting my account and I am reversing the money. They keep on adding the payment rejection fee.

Can you please ask telkom mobile to stop debiting my account. I am no longer having a contract with them?

Thank you in advance.

Kind Regards, Abel