my iPad Pro bent. And that caused the screen crack

my ipad was bent in normal cause of use. And some how it also bent back. As a result the Apple Pencil connected part bulged out. It also lead to the screen become no loner flat and cracked under the tension.

I have visited Apple store and they deny that it is a quality problem. However I just use it in the normal course with no accidental shock or external force added.

please suggest what can I do. Thanks.