Body glove WORST screenprotectors

Bought a glass screen protector for my phone but did not even stick to the screen, cracked upon first day of putting it on as it did not stick to the screen, took it back and the store said that it can't be replaced for a new one as it is cracked then after a few days saw that because it did not stick to the screen it moved and that allowed for dirt to go under the screen and as it moved it has scratched my screen, super disappointed.