Products being debited without delivery for months

I have had the worst possible experience with Telkom thus far, with no possible assistance. I opened a contract online months back for a laptop and my account has been debited since and yet the laptop STILL has not been delivered. The first response given for the first month was that stock was arriving the "following week"; this occurred for over a month and still no product delivered. Upon seeking further information I was told that one of their other laptops was available and in stock and thus the change would be swift, this was months back. Moving forward I have tirelessly tried to contact the sales department without being able to reach them at all and seemingly no assistance offered anywhere else. Reviews about cancelling contracts seems more horrifying than this current experience of paying for products not being delivered! Telkom's service is appalling