My daughter bought a used 2011 Vauxhall Astra 1.2 with 76k miles on clock in Feb this year with a 3 month warranty, but the air-con has stopped working. She went back to dealer and they told her it was not covered as it was a wear and tear item. What do we do now? Go back again and push for a solution? It was not a main dealer but a local used car business selling good looking vehicles.