Customer service?

I've been trying to gets answers from mtn with no success. Hopefully using this platform will yield better results. After numerous calls, emails and visits to the mtn store, both my queries are still not answered or sorted out. Firstly i had 2 contracts and requested that it be paid up and cancelled. I was given a cancellation quote and paid the amount given to me in full to settle. 2 months later a debit order for a ridiculous amount of over R1000 went off my account and noone can tell me why or process a refund. Secondly when i paid it up i requested my line to be converted to pay as u go. Since than when you call my number is sayd the number doesn't exist but i can make out going calls from the line. Please can i get some assistance, its been 3 months.

This is the third issue i am having with mtn in a year. Last year when my phone was ****** and i put through a claim, the claim eventually expired waiting for mtn to send me itemized billing and the issue was never ever resolved. I haven't been able to replace my phone thanks to the service i received.

I'm reaching ready to change service providers