MTN horrible customer service

Dear MTN it is impossible for 1 contact number to be on 2 different networks!!!

MTN has charged me a monthly contract fee for a number that has been ported to Vodacom in December. I have made numerous attempts to contact MTN and received numerous case number but the issue has not been resolved and they have not refunded my money. How difficult can it be for you to sort this out?

Whenever I request to speak to a Supervisor the Agents just transfer me to another Agent instead of helping me to resolve the issue.

I have had enough, I want my money back immediately!!!