Pathetic dont care attitude & non existent service

I did an upgrade on 4th of November 2018 at MTN Sandton City and since then I have not been able to use data. I have called 135, 808, 1555 multiple times as well as gone through to Sandton City multiple times. I have reference numbers and everyone promises me that the issue is being looked at and is being escalated. People promise to call me back and don't. No one is bothered to help me. But come time for their payment they will not give me a refund for the service that they did not provide. The only kind of helpful people are the MTN Sandton City staff. But all they can do is call the same MTN departments I'm calling so its not very helpful. Eventually on the 10th I returned the device and told them to cancel my upgrade as I refuse to be tied into another 2 year contract with pathetic service. When March 2019 comes im cancelling my MTN contract and moving to a different Network.

MTN's service and don't care attitude is pathetic. When I took out my contract in 2017 I was without any service (Calls, Data, SMS) for over 2 weeks. And now when I do my upgrade its a similar issue. after I cancel the contract MTN will not get another cent from me ever again.