Team Kia of El Cajon

My son, looking to establish his credit, bought an inexpensive car from them, was told he financing was set, and drove the car home. Two weeks later, he went to the dealer (nothing about financing) and was told he had 24hrs. to return the car because the financing fell through. The dealership never called him to let him know there was any kind of problem, leaving us to wonder if they would have just repo'd the car had he not gone in. People at the dealer that we spoke to were very rude and demanded the car back or they would come repo it. We simply wanted more time so that we could secure other financing, but they did not care.