MTN Corporate - Bad Service

I have been a loyalty Nashua Mobile client for many years enjoying good service and discounts as a Corporate Client. Since moving to MTN is has just been one big nightmare. One of my contracts is due for an upgrade and it has now taken a week for my status to be upgraded to \Corporate"on the MTN system with no luck. I have waste huge amounts of airtime trying to follow up with the corporate help desk and all they can say is \"" your status update is pending\"" and this is something that should have been migrated from Nashua Mobile to MTN without affecting me in any way. How long could it possibly take to update a status. Surely not more than a day or two. I have been told on my request to speak to a manager that the manager would call me back in the next couple of minutes and I am still waiting for that call. I need some resolution to the matter. When I upgraded with Nashua Mobile I had my phone delivered to me 2 days after the application. MTN is really not the best when it comes to customer service!!"""