New contract, but cannot phone

I moved from cell C to Vodacom, stood in the iStore at Cresta while the consultant ported the number and it was approved. However, I can still not make any calls on the so called new Vodacom contract. When I phoned the call centre I was told that I have to have a prepaid account of 3-6 months before I can port the number. However, I had a contract with Cell C and the number was released for porting at the time. Everyone is blaming each other now and the customer is sitting high and dry without a phone