Face ID Unlock

Hi.I have a problem with my Face ID unlocked.My iPhone was bought from Germany.I contacted with your service in Bulgaria to ask if there international warranty.They said there was one year.I sent my phone and they told me that my warranty was not valid because in the upper right corner there is a slight crack in the glass and one of the rear cameras too.To have a crack,but it is no to blame for the problem with Face ID unlock.The phone was purchased and its and would with this defect.Iknow very well that this is a software problem, because my previous phone (iPhone XS) had the same problem and that's why you replace it with new one.I know that even if I change the display with a new one the problem with my face remains.I want to do something about it.I do not intend to pay for things that are defect.Yes its my mistake that I did nit send it for repair before the glass broke, but I thought I would have to send it to Germany.You are the best on the market in the whole world.How you can you refuse of defective goods.Please do something for mine Face ID unlocked.the serial number on my phone is-C3****6Y8.The service is Creative Centre Bulgaria(Sofia).Expect adequately solved the problem.Thank you!!!!

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