Porting out from Vodacom to MTN

Problem porting from Vodacom to MTN. Have been trying since the 1st April. Contracted ended on the 5th March 2016, requested 30 days before for my contact to be terminated and switched back to a pay as you go. That took three days to happen, after the end of March. Now every time I send the port request, I get an SMS back stating that it was rejected, no reason given. When I phone them, I am told that they are between system changes and that there is nothing they can do I must wait and keep trying. I have kept trying, phone again and been into the Vodacom shop. I am still no further that when I started this whole process.