Monument Toyota Poor customer service

I visited Monument Toyota Constantia to purchase a Toyota Hilux. I was attended to by the salesman, Johan Myburg. After some negotiations we settled on a price which was confirmed in writing on 23/1/2015 by way of a signed quote. The vehicle finance was approved and the bank needed an invoice. The salesman sent me a signed OTP (offer to purchase) on 4/2/2015.. The reason for purchasing that specific Hilux was due to the offroad extras on the vehicle. That afternoon I get an apology from the salesman that the vehicle had been double sold. Not happy with this response, I contacted the Sales manager Riaan Hefer but get a reply the following day from the salesman to inform me that they have found me a Hilux at the same price, however with none of the offroad extras which were on the original vehicle. Why would I accept that. Still not happy with the outcome, I emailed Riaan Hefer only to be told that he was sorry and would \try"and find a replacement hilux. I then rep**** to say this wasn't acceptable"