Very upset client

In 2017 I added two more lines to my account. Two years later I wanted to cancel it and was told that I have to give notice 3 months ahead which I did. For that 3 months I checked to make sure all was on tract...,but come 3 months later after the contracts was supposed to be canceled, MTN was still adding it to my bill and telling me I'm in arrears.

To date MTN says I'm in arrears. It is my struggle every month and then my line gets disconnected.

As a long time client this service is pathetic. This AREARS has to be removed from my account as I'm a regular payer