Upgrade done one my account Online

I've been struggling with Vodacom since the end of February. I AM FURIOUS, I've probably went into Vodacom shops about 4 times per month and called the ***** department various of times after. I travel allot for my job, so I only noticed that a payment of 949 went of my bank account the day I came back from Daresalaam. When i went in to find out what is happening as I only pay a small amount of 150 per month. Somebody upgraded an Apple Iphone on my tablet account and THREE months of debit orders has already gone off!!!! The problem was reported but they can't find the guy on the system and \needs"to go back to the recordings on web. SERIOUSLY.I sent in my Affidavit and all the needed documentation to investigate the problem and ABSOLUTELY NOTHING has happened with this so far. And every time I go in they tell me there's nothing they can do for me but call the ***** department which I have done endlessly. Never the less that they keep sending me emails I owe them money since blocking the amount on my bank account due to Vodacom ALSO refusing to give me my money back...HOW DO YOU MANAGE TO UPGRADE SOMEONE ELSE on MY ACCOUNT!!?? No response"