Honda of Riverhead doesn't stand by their warantees

Bought an extended waranty for my jet skiis. One that was practically new began stalling when at high speeds. It took them a whole year to fix. They damaged it (there wasn't a scratch when they got it) and lost the cover. I haven't tried it yet and am hoping it really is fixed this time - been told that before only to have to bring it right back. I lost a whole year of use, the jet skiis have depreciated a year, it is now damaged, and they yelled at me when I picked it up and said I cannot bring it back there ever again despite I bought waranty from them! They are rude and incompetent and it has been a living hell dealing with them for the past year!