Pathetic service from MTN

Hi I'm struggling for almost 7months now to cancel one of my mtn contract. I keep getting billed for a contract that I never upgraded. Which I actually sent a cancelation through to the retentions department a month in advance. Till date I'm struggling with the same issue. You speak *********** people who don't know what they doing. I really need help with getting this contract cancelled ASAP. My contract cancelation was communicated on the 14/11/2019 a month before contract expiring/upgrade.

I am unfairly being charged and forced to pay for a contract that I don't want. Which I did my part to cancel it. If I don't pay then MTN barred all my numbers with them.

I feel that MTN should reimburse for the months I have been paying and not using this contract.

This is the service mtn gives there customers who has been with the network for 10years. TX alot...