Shocking Service from Telkom

I cancelled my LTE Telkom account on the 29 March 2019 at 8:01 with Tarryn Olifphant as reference number. I confirmed again on the 29 April at 15:15 with Thembi Molefe as reference number becuase my account was debited. Till date, I am still being debited. When I contacted Telkom again about this, they advised that I should reverse the Debit orders till the cancellation has been processed but I'm still being debited. It's at a point where debt collectors are contacting my family members for payments. Absolutely shocking service from Telkom