What could be the reason of tilt function of steering wheel in buck park avenue 2003?

Problem came after 2 days after mechanic fixed following things? 1.Rotate tires 2.High speed Computer balance fronts 3.Replacing front struts 4.changed the serpentine belt 5.preform theist angle computerized alignment.....Now suddenly tilted function of steering wheel doesn't work.means it's now remain there in up position and not moving to lower position.What it could be?wil it be expensive repair?The repair job mechanic did caused this as I never had this problem before repair job?.& I already paid 943 dollars for all the repairs and this is totally new problem now.