Questions about Displex Real Glass, 2D Panzerglas + Handyhülle

Does the company feel responsible if the phone was not protected correctly? Mine fell down yesterday and it's got a crack right in the spot between the protection glass and the etui cover, in the down right corner of the phone. Exactly where this product doesn't protect the phone, as it was mentioned in the other comments: - "The case is good, but the protective glass is too small to properly protect the edges of the display."

Is this only a bulletproof glass or is there also a mobile phone cover for the back and the frame? You don't see anything about a back cover in the picture, but it says in the description that it is included: bulletproof glass + phone case.