SYSTEM UPGRADE CAUSES ACC TO GO IN ARREARS

Last month on the 25th I downgraded my dstv account to the dstv extra package, I then paid R585, which included my functionality for the pvr etc. I noticed that the next day the account was still active on premium, I then contacted them on 26/8/15 and spoke to Goodwill, who ensured me that because of the upgrade the error will be escalated asap. On the 27th I spoke to a Lucy, who advised that there has been a note made on the system, that the downgrade is pending, but has not yet been activated, and ensured me that I will not be billed for the fact that the premium package is still active. On 1/09/15 I contacted multi choice again, because the downgrade still was not processed, and I was yet again promised I WON'T be billed for there upgrade error. On Fri 18/09/15 I wanted to upgrade back to the premium, went in to multichoice in Herm****, and the upgrade could not be processed, the system also showed I was in arrears on my account, I then paid R525, which clearly is not correct, because how can I pay R525 to have upgraded for 1 week. I hereby insist that the system error be sorted out, because my acc should be in credit and not show arrears!!! ref***8I15