Samsung - S860 Digital Camera

I bought this camera in pink and was so excited to get it.  The first few times that I used it, the camera worked great after that it only worked when it wanted to.  The flash didnt work, the lens wouldn't retract half the time and when you turned it on the service message popped up and the camera went off.  I called Wal-Mart, but since I didnt have the reciept they couldn't do anything.  When I tried to call the company, there was no answer and no response at the website either.  When the camera did work, it took bad pictures.  Either they were too dark...