Of course it won't fit...the process to lay carbon fiber gets extremely hot...as in smoking hot...it will distort just about anything that is being molded on but metal....then if it was vacuum bagged it probably warped even more.

Do no try to heat it...they'll never take it back if you do. Tell them you'll ship it at their shipping cost, not your's. (they probably get a 25-40%+ discount) I read eBay in someones post above...if you got it there then report it to eBay.