Unfair treatment

I would like to express my disappointment with the service I received from From Ford Struben street in Pretoria, We bought a BMW from them in January and sales person who assisted us was Steven, told us that the vehicle was under motor plan and they were going to extend it and it is going to be part of the package, The vehicle is due for service, we contacted BMW to book the vehicle in for service and BMW advised us that the motor plan is still in the name of the previous owner, the dealer were we bought the vehicle was suppose to bring the vehicle in for risk assessment and change the details to us, they even said they did not do it because they are running away from the cost involved, We try to get hold of the sales person, he does not answer, we send him a whatsup does not reply. We call the office ask to speak to the FNI, she says she will call us back she does not, We send Steve another whatsup for feedback, he responds with a voice note that unfortunately they wont be able to help us. We decide to take the vehicle to a BMW dealer for assessment and they also advise us to go back to the dealer to find out why they not take the car for risk assessment, We called them yesterday spoke to the dealer principle , he said he was going to speak to the sales person, he will come back to us, he comes back and he still does not want to take ownership of the unfair treatment they have given us. He took the vehicle details and was going to call us back, we are still waiting. We work for financial service industry, we understand the importance of treating customers fairly and with integrity. I feel they undermined us and took us for a ride. What a pathetic service we received even from the dealer principal himself, what would the sales people do if the principal can't honor his promise.