MTN doesn't cancel contract after 9 days

My cell contracts expired on the 14 & 15 of May respectively. All i want to do is change them from contract to pay as you go. I called the call center on the 14 of May to cancel the on and received a reference number for the one, then phoned on the 16th to cancel the other one. On both occasions i was told it will be finalized within 3 to 5 working day. On Friday 22 May i then went to a MTN Direct store to cancel them there as well as both numbers were still on contract. Up and until now noting has been done, no call to confirm that it has been cancelled or that they are working on it or anything. The MTN store told be it should be on Prepaid within 24 hours, this was on the 22nd and I'm still waiting. I have never had any issues with MTN but this is ridiculous. How long do you have to wait to get this done?????