Cancelled numerous times - but still being charged

I've cancelled my Telkom accounts numerous times - online and telephonically. They continued to debit my account. I cancelled it again, and now I am still received Invoices from Telecom, including extra const and once off charges ??

Request number for service to be cancelled ********** 361 : ********** 8

Request number for service to be cancelled ********** 178 : ********** 8