Charge for sim card & handset that need to be reversed

When I phoned Vodacom on Monday to check where my airtime had gone, after my previous Hellopeter complaint, I found out that I had an outstanding invoice for R2782.08 invoice K ********** that I didn’t even know about. The call centre lady told me it was for a handset that I cancelled – What handset? My contract ended in December 2017 and I don’t have a handset on it anymore. She escalated it for me but I need it reversed before the 15th as my debit order is the 15th. The case is 1- ********** ********** . Also I found out today that I have been charged another R97.85 to activate a sim card for a contract I never wanted, that apparently came “for free” with my upgrade. This is nonsense, and needs to be reversed as well. This upgrade has been the WORST experience. Something that should’ve been so simple has become ridiculously difficult and time-consuming.