Misrepresentation of sale

Firstly on Thursday 6 December 2018 we called in to enquiry for a service on a Polo vivo, we were quoted and advised by a consultant named, Simone that the car falls within the requirements of a special service running on promotion priced at 1500.00, all was well and the was booked, on collection we were informed we were misquoted for the service and also advised by Simone the advisor that the cars V-belt needed to be replaced/repaired as a serious matter of urgency. We then enquired about about the costs for repairs or replacement for the V-belt and were verbally quoted 1300.00. We booked the car in on Tuesday 18 December 2018, midday on Tuesday we received a call from Simone stating that VW Constantia made a mistake regarding matters of the the repair of the V-belt. She then said the mechanic working on the car at present informed her that there is no work needed or required to be one on the V-vbelt, she said they will replace or repair something else on the car at that stage she stated that us the client/ customer would receive a refund of 361.00 from the 1300.00 that was initially paid to repair the V-belt. This was the the verbal agreement. On the day of collection 19 December 2018, we were slapped in the face with a receipt of 3651.80, this was not discussed prior to any agreement and as you can imagine we the customer were not prepared for such a bill. When I spoke to the advisor Simone she stated that she had communicated this cost, which is not true at all, as I know VW constantia and they have always efficiently communicated costs in advance and I was never caught off guard until now... Simone had blatantly **** to my sandwich angered me further. I then asked to speak to the manager, who is Tyrone and he instead of approaching the matter rather took the time to insult me and patronize me rather than show empathy and assist me with my queries and dissatisfaction with their service rendered. I am not happy with the service received over and above the initial quote and agreement I was forced to pay 3651.80 which cannot be substantiated. The service received was appalling and I am disappointed that in 5 years of of great service. I was conned and bul**** into paying a an amount which I was unprepared to pay that was not consented to prior and not communicated at all. This was misrepresentation of sale. This is supposed to be a South African branch rendering a service that best suits their customers instead that have **** and bul**** me into paying something that was not communicated.