trunk latches, but pull down motor won't pull lid down. on 1991 Cadillac Seville

Mint 21K original mile car, trunk pull down feature always worked fine before I left car at apolstery shop. When I picked car up the trunk lid was latched, but not fully closed. Apolstery shop owner claimed failed pull down switch or pull down motor. My guess is that they caused the problem by slamming the trunk lid down, maybe more than once, trying to close it before becoming aware of pull down feature. Who is probably right & how do I fix it?

Asked by for the 1991 Cadillac Seville
Hard to say but it is possible to damage the "close feature" by trying to slam and force it closed.