Hello AnastasiaTkachu
Please, kindly refrain from using cyrillic letters as they make the search for a topic in our SBB Community difficult.
Whether you should file a loss report with the police we cannot judge. It depends on the content of the bag.
It is well possible that your bag will still be found. If I see the amount of items we currently find on our trains, it is likely that the registration of new items takes more than ten days, as usual.
Kind regards,
Roland