MTN Contract declined

I have been an MTN prepaid user for a few years now and have been happy with the service to a point now where I am comfortable taking out a contract for my business with them. I was at the store in Canal Walk to apply however the contract was declined for a reason which the agents cannot explain. My business has no debts and more than enough income to sustain a cellphone contract. I have a great credit score myself as well but no one can explain to me why it was declined. It is also not possible to call someone and do a follow up as all of this communication is done via email which is great but then there needs to be some sort of explanation. Even the store is getting frustrated as I am on the brink of changing my service provider after wanting to give them my business even more.