Contract migrated to Prepaid without permission

My contract was migrated to prepaid without my consent on Friday 22nd January.<br> <br> The call-center consultants have indicated that the Vodacom system has been compromised and that there has been a serious breach of security to their system. Has anyone seen a press release about this issue?<br> <br> I was promised that the issue would be resolved this morning 25th January - nothing has been rectified. I still cannot make calls. <br> <br> <br>