Pathetic service ever from MTN

Good day

Mtn has suspended my account for default payment.

My reason for defaulting are , I called numerous times asking mtn to change my account from 2G to at least 3G as I took this contract for Data purposes only, sadly that never happened, the following day I called again after I realized I was accessing 3G network the consultant told me am still on 2G she will ensure I get access to 3G which never happened.

I then decided to buy a prepaid data from other service providers which in so doing I couldn't afford to keep up with my mtn payments as it was useless for me to keep paying for something am not using.

This led to my mtn sim being suspended and handed over to their legal department. I then paid my arrears in full as I need to clear my name from the Credit Bureau.

Now am asking MTN TO PLEASE CANCEL MY DAMN CONTRACT as they are not willing to render me service they promised me, they want me to pay R1000 something for an early termination, I feel ****med by MTN for the following reasons

The don't keep up to their promise and yet I must keep up with their payment for something completely useless useless am not using their sim anymore as I can't access Data from it, I regret and don't wish this to happen to anyone, MTN is a ******** company watch out.

Am stuck , not knowing what to do now, am not allowed to pool out of this ****, am forced to continue paying for something am not receiving. Some help please