The mechanic texted to inform me after performing a tuneup that he couldn't fix the rear disc brake because he couldn't find the part and had no idea when it would be available. He should have contacted me before proceeding because I would have nixed the transaction. So I was stuck with a 99 buck bill to retrieve my bike with a worthless and unsafe rear brake. I requested a refund and the store manager offered to reduce the bill by 16 dollars after trying to sell me a new bike. I have purchased several bikes from Kozy's in the past but you flunked Business 101 this time around. The tuneup/repair was clearly mishandled and I want a refund.