Shocking!

I cannot believe the terrible after sales service I have received!! Not only was the car that was sold to me not checked out by the dealership but the service I receive now after asking for help is terrible! After 2 weeks of trying to get hold of Sam, he eventually called me and was so rude and condescending! I am absolutely appalled! I understand that I should have had the car checked out but as a fool I trusted the dealership had done their job by liaising with the guy who did the previous service to see if it had actually been done! The service book has been water damaged somehow and Glayer Auto who had done the services before didn't even stamp the book! That should have had a few red flags up already!

Please can I have some advise on how to proceed