Cruise Control doesnt' work on 1992 Cadillac Seville STS

Had a new transmission installed in my Cadillac. When I got it back the cruise control no longer worked. They said it needs a new switch and the cost of the part was $190.00, plus the cost of installation. I told them it worked before they started on the transmission - they said it was probably ready to go out and they were not responsible for it.

Asked by for the 1992 Cadillac Seville STS
I'd say, find another Caddy or GM specialist and get a diagnosis to find whether the failure is due to the transmission work. If the transmission guy is responsible, then he owes you and you may be able to collect in small claims court if he won't take care of it when you show him the repair bill for getting the cruise control working.
If you want to find a specialist, here's a directory link for you: