Sorry dude but you own that bike. You've been riding it for 3 months.??.... You own it. I would have resolved that issue in 5 business days. And for that much money I would read every spec, every word, every review and everything before I purchased/ordered the bike. Everything would have to be perfect in my little mind before I went through what you're going through.
You own it.And beyond that, that dealer would be history. Gone. I would never open that door again. They should have advised you better. And, they should have realized that even replacing parts for a good fit was not possible. You both screwed up....