Sounds like you bought it new. Bike stores that sell new bikes seldom accept returns or even exchanges because of liability: they don't know what happened to the bike once it left the store. Maybe the finish is pristine but it got in a head-on collision and the head-tube is fractured all about on the inside. It just isn't safe. But honestly, if they're friendly, you rode it only a couple miles, it's in the EXACT condition you bought it in, and if you're going to pay more for a Pake, they might consider it.