Telkom still TAKING my money for cancelled contract.

After numerous requests since February 2018, to cancel a mobile data contract, Telkom is still taking money from my account EVERY month. After my most recent encounter with Telkom, they assured me that the account was cancelled. So they are now taking my money for a contract that no longer exists. Is this not ****************? Telkom is taking money from clients which they have no right to and do not care.