Cell phone inferior screens

This cell phone repair shop at Cresta Centre is the worst ever ! I had a crack on my Samsung phone screen and asked them to replace it. They replaced it with a screen that would not operate properly and kept freezing. I went back many times and they fiddled around with it and got it working again. Also after 5 weeks the phone had a small crack on the side of the screen, so I paid for another new screen in full. I had the same problem again with the screen freezing and not working and then I was unable to make any calls from the phone. When I went back to complain they said it was another problem with the phone and not the screen. Absolute ******* !