I am furious with this place. I took my iPhone 5S ...

I am furious with this place. I took my iPhone 5S in because my front & back camera stopped working. That was the only issue I had. VGH told me they could fix the cameras and not only were the cameras not fixed but the entire screen was ruined. It only shows black now. They said they could fix the black screen but would charge me 99$ for a repair they can't even guarantee will work. Being asked to pay for a problem they caused is a bit ridiculous. I went in with a 50$ repair and left with needing to buy a new phone.