Rude Mondo agents

I attempted a laptop contract on Vodacom, for some strange reason an agent who's name I forgot called me and without giving my sufficient time to explain myself said it the application has been declined and cut the call. For some strange reason I have managed to secure two cell phone contracts and a data contract via Mondo however on 5 occasions MTN has always declined my applications. Telkom and Vodacom have approved me and my ITC scoring is not the problem. What frustrated me is the the Mondo agents only call and allow you to explain if they have done a credit check and you have been approved. Who authorized a credit check without making any contact with the client and why are the agents so rude they cut the call and move on to the next client.