Really poor service MTN

Pathetic service overall. To cancel a contract, dial 135. Purpose of cancellation is poor signal and the contract ended. I have to dial 135 with no signal! Why is a service not suspended once the contract has expired? And why can I not do the cancellation in a store? And upon going through the process of 135, a customer champion has to ask security questions.......ID number please! Really. So MTN is not aware of the POPI act. After giving the information, I will be transferred to the cancellation department. I'm forced to disclose my ID number. Now I'm being transferred. I'm waiting patiently. Nothing happening. Line is silent. Call ended 24minutes 8 seconds. No success. Have to start the process over again! And I already did the cancellation 2 weeks ago, but according to the MTN store, the number has not been cancelled. But the debit order will be submitted promptly. Very bad service.