Bad service from Winnie Mosolwane

In the beginning of May 2019, I called the Telkom Call Centre on 180 to do a notice for my cellphone contract cancellation and I spoke to Winnie Mosolwane who was full of attitude. Winnie assured me that by the end of June my contract will be cancelled, June will be the last debit that I must expect from Telkom. On the 2nd of July I decided to check my data balance on that contract sim and guess what? Winnie did not cancel the contract as instructed and Telkom loaded the 2gig data which is still there even now. I had to call again to request the same contract to be cancelled.

My main concern now is that I made a notice for my contract to be cancelled so now I'm being told due to the data that was loaded on the 1st July Telkom is still going to deduct on the debit order date. I already made a debit order to pay my son's school fees starting now in July so I don't understand why can't Telkom take their 2gig data.

Is it my fault their staff did not do her job properly? Why am I paying for Winnie Mosolwane's mistake?

To think I would ask my friends to port to Telkom but I will not do that anymore, in fact Telkom just lost a customer and I will spread this to all my friends and family.