MTN Eastgate Mall - Taking more than 5 days to allocate contract to me.

I currently have a contract with MTN and would like to take out another (porting a per-paid number) but its taking more than 5 days to do so. Eastgate MTN says that it is because MTN have moved over to a new system and they have never used it. Everyday I get about 15 sms's saying 'authentication failed' then immdediately after I get another saying ' You have been successfully authenticated' the after that, one saying ' We have Un-Reserved SIM/Device for your order' - and this happens in not particular order. I dont understand why this process is taking so long especially since I already have a contract with MTN. What is this system that some of MTN uses while other branches like Eastgate say they havent used it as yet???