depends, usually when you buy replica's they are sold "as is" in the agreement you click or agree to in some way there is usually a clause about refunds/returning. On replica's they are almost always sold as is, I've never seen one with a return policy. The body shop can fit the kit to your car, it just costs more $$$ that's all.
On another note, that sucks, I was gunna buy a kit from overseas but found out it was a replica at the lest second so I got out of it for this exact reason. Hope everything works out.