Display film / bulletproof glass - another crack after one day?

ch
- in Mate series
1

Following, my brother bought a Huawei Mate 20 Lite the day before yesterday at Saturn and directly bought such a foil / bulletproof glass or The coworker has the offer, 30 euro and has us pretty well on it. Next morning, my brother wakes up and has a small crack in the middle of his right side and on the left side it looks like it's open somewhere. He said he did not know how this could have happened and the crack got bigger during the day, as I went back to Saturn with him, because I thought, he is afraid to admit, that this has fallen to him. So I let him put on a protective glass for 30 euro again.

This morning he comes back to me WITH EXACTLY THE SAME RIP AT EXACTLY THE SAME PLACE

and left are again 2-3 such small dots that look like the phone would be open somewhere. My brother was at home all day and he is not that clumsy.

What the hell is that? I suspect that there's no "warranty" or something on the protective glass? I just can't explain how this is possible…

Cy

Even a protective glass has warranty.