Dealership fail to repair Purchased Vehicle

I have bought a Corsa Utility 1.7tDi bakkie from Voorspoed Motors on 24 November 2017 and have had problems since day 1 of the purchase. The vehicle was sent back the following week to their Workshop for repairs and during the 10day period they repared only 2 items from a list of several items. Seeing as we have no other transport we had to lay on their backs and try and get feedback on a daily basis as it became clear to us that not much was being done. Voorspoed then phoned us and said that we could pick up the vehicle after the 10day period which was on the Saturday, 9 December 2017. After collecting the vehicle my fiancee inspected the vehicle and found that not all repairs were done as promised. We have been in dispute with Voorspoed Motors since the purchase date and now they request that we send the vehicle back to them, and seeing as it's the festive season, most companies are closing, which means that we will be without transport for a further month or two even. I have no guarantee that the vehicle will be 100% after the repairs have been done and should the vehicle break down in a few weeks/months time, they will simply say that its due to our negligence. I do believe that I have been sold an unreliable vehicle that did not go through the proper testing, ie. AA Testing. I have requested to cancel the purchase, but Voorspoed insists on repairing the vehicle. I am not happy with the workshop they have assigned to do the repairs, and do not trust that the workshop has the customers best interest as this seems to be a Friend/Friend partnership. I have contacted MFC finance and am not pleased with their response either. I am not pleased with Voorspoed Motors at all, and am still weighing my options as I am not interested in keeping this vehicle or having it repaired.