sold me a defective bike

i bought a truimph from these people, that came with a 30 day warranty i added an external warranty on the bike 29 days in the bike dropped a valve and broke, they claimed under my warranty and not their own, they have had my bike going on 59 days now Ive had it all of 29, each time i call i get a different excuse as to what is wrong with the bike. this has been the worst service i have ever gotten from any dealership and im still sitting without a bike and every time i call i get a different excuse to say i need to wait a week longer because something else is wrong.