Hello - My name is ***** ***** I will try to help you. Unfortunately there are not any options that you have if you do not have your key. Are you willing to factory reset your computer ? Follow this link on instructions from microsoft on how to reset your surface. https://www.microsoft.com/surface/en-us/support/warranty-service-and-recovery/restore-or-reset-surface?os=windows-10
Hello - I hope all is well. Were you able to factory reset your computer to resolve your issue ?