Unless you are rich and completely inept mechanically you would be better off trying to do it yourself. This site contains just about all you need to know about Bricks and some things you don't. The members can be very helpful, if you help yourself and try to look up the information you require using the search engine. Posting pictures of your problem is virtually mandatory, along with sound recordings if you need help with unexplained noises. Download or buy a manual Clymer or Haynes it will help.You will also have to develop a thick skin, sensitive people do not survive long.
Welcome to the asylum from the land of OZ.