VELOCITY CALL CENTRE DURBAN, NO CUSTOMER SERVICE

On 8 June I bought a phone from mtn via velocity, same day my services were cut, when I phoned mtn they informed me that the person sold me a phone that was not meant for me, I had to little credits, I must tell them to cancel the contract and deal direct with mtn, they will give me more credits and reinstate my service. I spoke to various people at velocity and no joy. This is 10 days later, no phone, and no service, with service I mean no internet or social services. I spoke to Skhosana's boss and to other bosses, they are not up to standard, they can sell something NO customer service what so ever. After the 3rd day Skhosana screamed that the contract was cancel but mtn said it's not true... what do I do in a case like this?? What happens in this country....customer service is no priority. I GOOGLED THE COMPANY AND THE CEO IS MR JOHN HAWTHORNE... DOES HE KNOW HOW HIS PEOPLE TREAT CUSTOMERS??????