Very dissapionted in MTN Service

I went to the branch in Mimosa mall Bloemfontein to open a contract for a new phone. After a long wait the consultant assist me and help me with very good service. He said I can go home and in a hour or two he will call me to confirm if my contract has been approved. He called me in less than two hours to confirm that my contract has been approved and I can come and pick up the phone. When I arrived I waited for another half an hour for the consultant to assist me. When he finally did came to help me, he told me that the contract show that it is approved but I can not get the phone because it is not approved on the system, it is a mistake made by the people who approve the contract. My credit limit is over a R1000. I'm very dissapionted in their service and that they let me drive around unnecessary and wast my valeuble time. It is no way to treat a castomer