Kickin Grass Mower Shop

Took a mower into this shop for warranty repair due to a problem on the mower since new. It was obvious when I dropped it off the shop did not want to do the warranty work. Bet my father $ 10 they would find a way to charge me somehow. Sure enough, not warranty. They gave me a very unconvincing explanation. I suspect they are billing me and the mower mfr. for warranty, i.e., double dipping. Are they trustworthy? Use them and be the judge for yourself.