my whole screen fell off my ipad! how much money will this cost?

My screen was very shattered, so I got it fixed can the people who did it (not at apple) did a very crappy job. I could see though the camera and it glitch so it would face time people and go on random apps. It cracked again. Then the screen was slipping off, and eventually fell off completely. I need this fix asap, could someone tell me how much it cost?