Migration nightmare

My contact is due for an upgrade, don't want to stay with MTN due to bad reception and even worse service, thus I requested to migrate my contract to prepaid, in order to keep my number on 26/3/2016. Quinton @ MTN I'langa assisted me to complete the mifration request and told me that I can expect feedback in 7 days, Ref nr 645000 and will receive a sms confirming this. Up to date I have had no feedback, I phoned Quinton today, 14/4 and he then told me that they could not do the migration due to my account being in arrears. I asked how is this possible as they take the funds every month via debit order, he told me that his system was down and that I need to phone 808, which I did. Spoke to Siyabonga, which said that they cancelled the request due to outstanding amount, I said but why don't they communicate with me, my debit order goes off on the 15th, which is now tomorrow, he then said I would have to request again for migration after this, which could take another 7 days, and then again I will be in another month with the contract, and I suppose I'll get the same story again. I just want to migrate asap and go on to prepaid!