Appalling Service

I have been charged an amount of R155 which has now gone up to R165pm on an old Telkom account which I cancelled a year ago. I tried to cancel the debit at the bank but it still continued to go through so I went into Telkom to try and sort it out but they could't locate the problem and told me their billing department would phone me that day. It is three weeks later still no call. At the time I app**** for an iPad contract with them and was told I would hear back in 7 days as to whether I had passed their credit check and then I would be able to come in and collect the device I still haven't heard anything and because I've filled out all the forms and signed them I'm too scared to go elsewhere to get the iPad in case I'm tied into the one at Telkom but I can't get anyone on the phone. I've gone onto their website and asked for a call back twice now with no luck. It's an hours drive for me to get to their store so I'd really like to speak to someone on the phone first. I think their service is appalling.