Cancellation of contract

good day, last year July I send through a correspondence to Telkom to cancel my contract which was ending in August. The cancellation department responded to my mail requesting details to cancel and 8 months later I still am being debited for that contract which I no longer use as they have sending data to the sim except the sim was cancelled of the network on the day the contract ended.

i have seen the numerous complaints of the Telkom cancellation process and department and yet nothing gets done about it. There is people that have complained in 2015 and 3 years later there is still an issue about how people cannot get their cancellations done in time or refunded for all the months they were debited for.

People follow the process and yet Telkom cannot follow through on the numerous occasions. Where is the management to ensure that things need to change when people are complaining about the same thing or is it about just getting the customer on board.