Dishonest information regarding purchasing of vehicle

Bought a single cab 4x4 Ford Ranger even paid for the Dekra to be done, Dekra came back with only had brake to be adjusted. 325 km onwards oil leaking on the diff.. Took it to another accredited dealer with result that the whole diff needs to be replaced, no oil in gearbox, this resulted in big expenses. However I manage to spoke to a manager and after I have send her all the documentation and expenses, she promised to come back to me... No luck does not answer my emails nor sms. We are in the process of a legal matter as the Dekra outcome was false and their verbal agreement that the car is clean you will not find it better elsewhere. I feel betrayed by their services