Called to fix my bi-folding patio door lock failur...

Called to fix my bi-folding patio door lock failure. I got same day appointment and I am charged 86.40 pounds for the visit (very expensive compared many others). I am told the lock is broken and they dont have spare parts of it and I need to contact the door manufacture. He jammed the door so that its safe at nights and did some small work for another door.