Communication Disconnect

In April 2020, two weeks before my contract number *** expired - I upgraded the contract. To my disappointment, MTN continued to cancel and disconnect this number. I have completed three online contact forms (***;234220;***), and received no help thus far. There is no answer when calling MTN from a 'non-MTN' number. They continue deducting fees, and I have to continuously pay for data and airtime to communicate on my other number. It is extremely frustrating, especially as electronic means is the basic way of communication at this point in time. I hope to have a permanent resolution for this challenge, soon.