The window regulator is a cable type. What usually happens is that one of the cable guides where the cable makes a turn wears and the cable binds. The repair is to replace the regulator.
As a temporary thing you may be able to get the window up with the help of a friend. You need someone to operate the switch while you with the door open squeeze the glass firmly between both hands and apply upward pressure. If the glass stalls, release the switch a moment and try again. It may help to back the glass down an inch or so and try again.
When I needed one, used and rebuilt ones were available on ebay, used ones were in CEG classifieds, and of course new ones were available from the dealer. It can be changed in about an hour if you take your time.