Won't let me upgrade contract

MTN refuses to allow me to upgrade my contract (despite sending me numerous notifications to do so).

I've had an MTN Business Contract for over 7 years now, and I decided that I wanted upgrade it to the MTN Black Friday 200gig x18 month special. I have been attempted to upgrade to this contract for over a week.

Initially, I visited your Pavilion branch where they said they were unable to find the Black Friday deal on my contract seeing as I was a business customer, which is quite frankly a pitiful excuse. I am the customer and I'm not interested in your business contract offerings.

I then attempted to apply Online. I was contacted and the contract application was done, however I received an sms saying my credit check has been paused due to outstanding documents and that I would be contacted, however no one contacted me with regards to what documents was needed... Eventually I app**** Online again, and when someone called me, I let them know what my situation was and they advised that I needed to send my ID to ***, I was not comfortable to send such documents to an inbox that doesn't end in mtn.co.za, but i did it anyway and the mail bounced back immediately.

I then visited another branch of yours where I've been assisted by an agent named Mubeen that has been far more helpful than any of the channels I've tried to apply through.

He has been extremely helpful and communicative and has tried to redo the upgrade application multiple times with no success. Each time I just get a failure sms. Eventually it was found that the system needed me to resubmit my documents- I have done that but the system still keeps failing my application... why is this?

The only good thing out of this experience has been dealing with Mubeen, but there's no use having such great staff on the ground if I can't continue my relationship with MTN as a client.

I want my 200gig Black Friday special that ends tomorrow, else, I'm cancelling my contract entirely and moving my entirely off your payroll. Thanks