Vodacom accounts department issues

I have had a complaint logged with Vodacom since April.I request that my sons cell phone bill be removed from my bank account debit order as it is **********ly bring taken off my account every month as he transferred his cell phone into his name and bank account.The invoices came through in his name his details however the installment kept coming off my bank account and still is.He has gone into a Vodacom shop and so have I. Have been told its a accounts department issue.Last week my son has been told all is sorted and funds will be taken off his account.Well surprise surprise when I get my statement this month my sons number invoice has been put bank into my name and the installment still scheduled to come from my bank account. This needs to be sorted out as soon as possible this has been a on going issue with Vodacom since April it is now September!!!!!