very disappointed 229

hello, I am very disappointed with this cover! Why?
it's simple, my laptop has 15 days (iphone 5s) and is already scratched because of the small strip of aluminum - or I know not what matters. with cover, they send a rear protective film but for me it is useless because the back of the phone is protected and enclosed by the cover. they would have done better to send a film before that would have avoided all this. the only positive thing is that it works well - I do not say very well because if you close your case without first locked your iPhone, you may unintentionally touch the aluminum strip which is used to get and possibly spend an involuntary call.
very disappointed with this cover that scratched my phone that was not even 15 days.