Contact police.
If you had "find my device" enabled, it could help.
https://support.microsoft.com/en-us/help/11579/microsoft-account-find-lost-phone-device
http://www.howtogeek.com/235083/how-to-track-your-windows-10-pc-or-tablet-if-you-ever-lose-it/
http://acer.custhelp.com/app/answers/detail/a_id/84/~/what-do-i-do-if-my-product-is-stolen%3F
