Unacceptable customer service and false publication of a vehicle for sale

On Friday 22-08-2019, my boyfriend contacted the dealership to enquire about a car he saw on AUTOTRADER. He specifically asked whether the car was available for viewing in order to make the journey down to Nigel from Johannesburg early Saturday morning and was told it was available. Upon arrival at the dealership, we enquired about the vehicle (VW AMAROK) but were advised the vehicle was in the warehouse however they would have it at the dealership within 5 minutes. We stood waiting patiently for the vehicle to arrive, after some time, I called the reception lady to find out whether this car actually exists or not as we were told the car would be available in 5 minutes. The sales person assisting us (Eugene Johst) then advised the car required diesel which was taking time but will arrive now again in 5 minutes. In total we waited an hour for the vehicle to arrive. The car was checked and test driven and upon arriving back at the dealership, advised that we would complete the application for finance approval. After completing the document and providing the personal details, the application was submitted and we left the dealership. Eugene requested that we submit all the documents (ID, bank statements) to him on Monday 26-08-2019 for their records. Whilst on our journey back to Johannesburg, Eugene contacted him and advised they received the pre-approval and will now await the final 2 documents. On Monday morning, he e-mailed all the documents to Eugene, as this was the final requirement needed to finalize the deal, however today Tuesday 27-08-2019, he was contacted to say that the vehicle has now been sold to another buyer and therefore the deal was off. Not only have these people wasted our time, but obtained personal information when in fact there was no 'vehicle' in the first place. This was suspected on Saturday as we waited almost an hour for a vehicle to travel within Nigel (from the warehouse to the dealership) which even in Johannesburg would be seem to be an impossible time frame. Upon him signing the initial request for finance and the telephone call to confirm the deal had been approved, it seems implausible to sell the vehicle to someone else as you already had a 'confirmed' deal. I personally feel this was a method of obtaining your personal information which can be used for other means / purposes. We require a full enquiry into this matter and will take it up with MIOSA directly