Misleading and bad customer service

Vodacom Disgusting with service, misleading. A few weeks ago I app**** for a laptop deal I saw on the catalog, when I went to collect it the software was missing in it and I then asked the lady who was helping me where is it she told me she don't know she went to speak to a manager he said they will order it and get back to me within a few days when I told him I'm leaving the laptop, 1 week later still no call from them then I went to the store they said it still never arrive they will call me. I then called 2weeks later only to find its still not available they told me it's out of stock from the warehouse then I told the lady I'm canceling the contract as what they had given me is not what we agreed on plus I'm due my first installment this month but I'm still not able to use the laptop as the software is not there. I want to cancel this policy and I will not pay any cancelation fees for it. And if I didn't see the software was missing while I was in the shop it's clear I would have went home with no idea and when I go back they would have said it was there.