Carbon fiber rear bumper diffuser for BMW 3 series F30 M sport M-tech M performance style diffuser

Diffuser looks ok, made out of cheap material, but definitely did not fit. The diffuser is about the same size but when you try to put it on the holes for the screws don’t align with where they go they are almost half an inch off. When I put the stock diffuser on it goes on no prob no fits well this does not. I contacted the seller but they told me to take it to a professional for installation, took it to a buddy of mine who’s uncle works at a shop and they told me the same thing. Very disappointing. Hopefully I can get my money some how if not almost 300 bucks down the drain