True. The only way they could try and get money from you is by "supposedly" paying for repairs first. Obviously, if they contacted you about money BEFORE going ahead with any repair work, your answer (and anybody's answer for that matter!) would certainly have been no.
I've dealt with a few individuals who have tried to claim money back through items that have been "damaged in the post". When I tell them that they can claim it back through the postal insurance (I send everything recorded/signed for) they tend to reply "I don't think I'll bother. Not worth the hassle." Makes you think if it was true in the first place!