Yep, I've bought a couple things in my life that weren't what I thought they were. Probably most people have done the same. But, that doesn't mean the seller was dishonest. On the ethical edge maybe, but not out and out dishonest.

As far as not answering your emails/phone calls it reminds me of some people I know. In their opinion once money changes hands the deal is done and they don't want to revisit it. You probably aren't one of them. But there are lot of people out there who are never satisfied with a deal. If you let them they'd be renegotiating for eternity.

By the way; have you now thoroughly examined the bike and are satisfied you have it correctly identified as to Make, Model and Condition? Or, are you now taking the bike shop's word for it?

From other posts it looks like although the bike isn't what you went to market for it is a fine machine that could serve you well.