Extremely Poor Service & Not willing to take responsibility

I have 2 cars under the maintenance plan of Motor Happy and I took one of my cars for repairs under a dealer. However there is an issue now as the Motor Happy Sales rep who entered my car details on the policy schedule entered one car reg number for both the cars, now the car I am taking to perform the repairs is not picking up on the policy. Now my car is sitting by the workshop for the last 4 days and they are unable to help me. The Motor Happy team are also very slow in assisting and are simply stating they are following policy! No responsibility taken! I would not recommend anyone to use them!