Telkom bills although no service provided

I have been battling to get back my deposit from Telkom and a refund for debiting my account for almost a year now. I app**** for ADSL, paid a deposit and was then told there was no infrastructure in my area but was still billed even up until now. I called the finance department, they said the order would need to be cancelled with sales so I went into the store which is where I made the order in the first place only to find out that they couldn't help me as I could not get an account online to do cancellation. I've since called finance back and sent through a paper cancellation which I was informed would take 14 days, everytime I call I get the run around. If the order was made in store why can't it just blady be cancelled in store? I've paid for two months of no service now and have still not received my deposit because an employee who can assist me at Telkom does not exist.