Upgrade Gone Wrong

I could upgrade in Dec of 2014, but Cell C could not provide me with the requested phone. After personally speaking to Lumia, Cell C received limited stock in March and mine was kept aside at Cavendish. At upgrade I was told by the store as all my contracts have reached full term that I can cancel it with immediate (current month-end) effect. With this I upgraded my contract as the new contract had a lot of data and I didn't need my old data contracts *** & ***. After attempting to cancel these contracts at 084143 option 2, I was told I need to provide 1-month notice. They referred me back to the store. I've been referred back and forth regarding this matter. Fact is, my April debit order went off today at R2319.60, a R1000 more than I normally pay in a month. Call Center Ref *** indicated again that there is nothing they could do. The store also says the same thing, yet I just have to pay even though both these contracts sim cards was destroyed on upgrade. To make matters worse today I was told that the same will happen in May as well!!! This is absolutely ridiculous and hopefully HelloPeter will help resolve the sad-sad mess.