Problems with assistance and poor quality product

We took my sons car to Lindsay Saker in Welkom for the 45000km service. The main key was not working, and Anton told me that the chip was broken because the key fell, and that this is not covered under any warranty. On Anton’s advice I phoned VW head office***) and Elvah told me same – no help with the key. This car is my son’s vehicle, I drive a Mahindra and my keys has fallen many times, but no damage. I need your advice on what to do? Must I accept this or have I got a case, it does not seem fair to me. Keys do fall and I cannot afford to pay this every time for a new key.(R2000.00)