Ford Mustang part late delivery

Ford SA has inconvenienced since June this year I have not been able to enjoy my FORD MUSTANG GT because they can't find the Harness Part anywhere in the world ? to solve the problem on my vehicle. If you are planning to buy this please be ready to not drive for a very long time should it gets any electrical fault. I have been paying installment for the past four months but I have nothing to show for that. The part was ordered more that four times and each time the part gets to SA it was found to be the wrong Part. A gentleman at the call center by the name of Albert keeps telling me that Executive Management is dealing with the issue and I keep wondering when will the Executive Management come to a conclusion that they have sold me a product that to be returned back or replaced since can't solve the problem. I even wonder how do they sleep knowing very well that someone has a car that is less than a year but he can't even drive. FORD MUSTANG has always been my dream car and now it has turned to be my worse nightmare. If only they knew that I was one of the first few people to order the vehicle maybe they will understand what I am going through right now. Friends are starting to think maybe the bank has repossessed the vehicle and if only the knew that Ford has sold me a product that they can't even fix. I'm very upset, unhappy and disappointed with Ford SA. The question I have for them is what will it take for them to decide to Replace my vehicle. For crying out loud this is a Million Rand vehicle and even one of their signature cars.