Sorry to hear about your experience @kello ! As we value the security of all our neighbors, when a device changes owner, there is a change of ownership procedure. It’s as quick as an email to the previous account holder, whom should then remove this device upon request. It can sometimes take a little time, so we recommend retrying a setup again to see if ownership has been transferred.
If not, please feel free to email deviceowner@ring.com for further assistance. Thank you!