Poor Service

Good Day please kindly be advised as to the fact of the poor service that I received from Edenvale Nissan, I took my vehicle for a trade in valuation and after discussing the option of a trade in and looking at three possible vehicles on the day I was not offered the opportunity to test drive any of the vehicles which I looked at and also I was informed as to the fact that I would receive an sms from the sales person whom I dealt with, which never happened as promised and after having waited more than three weeks I called Edenvale Nissan and complained about the service received and then suddenly everyone wanted to help after I told them I am going public with this matter and suddenly I am receiving phone calls apologizing for the service and what can be done to restore the relationship between customer and organisation.