APP**** FOR CONTRACT DECLINED NO REASON PROVIDED

So on Wednesday I app**** for an Huawei Tablet on contract with MTN in Campus Square Johannesburg I received a message soon there after stating that they had sent my account in for vetting, I checked in again yesterday and they told me it was still being processed and I should wait for comms. No comms were sent I had to call the call centre today to find out I was declined on the 24th all the consultant said was credit bureau, I went back to the store gentleman said I was declined didn't know why. Trans union and XDS provided me with my credit reports no negative listings were present I called the call centre again, they put me through to MTN direct and no one could give me a reason as to why and told me I must call ask switchboard to put me through to vetting which I did and was greeted by a very rude receptionist who put me through the campus square branch again were manager informed he doesn't know either until now I have not receive communication from MTN or reason as to why my application was declined, if this is how MTN deals with its potential clients I really feel for clients that have already signed up for such repeated appalling service.