Vehicle Purchase

I am the Service Manager at one of the four big banks. I have done a deal for one of my customers through the Hyundai dealer in Bethlehem and my client is still waiting for the vehicle after full payment was made 10 days ago. I am unable to get hold of the salesman who assisted me from the very beginning and I am being pushed from pillar to post. I am sitting with a client who is very furious with me and I don't have the answers, this is totally unacceptable and a disgrace!! I have left several messages but nobody is getting back to me. This is the first time my client is buying a vehicle and it is also a birthday gift but it is a horrible experience that she will never forget. I need Hyundai Bethlehem to resolve this problem as soon as possible!!