WAITING FOR EVER FOR CREDIT LIMIT INCREMENT

On Thursday 22 October 2015 I telephonically I apply for a credit card increase with african bank and I was informed there were offers on the system and that I should visit a nearest branch. I did visit a nearest branch ( Andries Street - Pretoria) on Monday 26 October 2015 in the morning and those offers were highlighted to me and then I made my choice. However upon applying the system reflected that my account number cannot be verified with my name on the system. How can that happen? I mean I'm an existing client and african bank is debiting my account on the monthly basis. <br> <br> Their IT department is ****ish, from Monday morning Tuesday midday they haven't solve this problem. How do they justify this? For existing customers not to get service when they actually do qualify?