Jarrah
That’s a rough situation, sorry you’re dealing with that. Since they turned your Google account into a supervised child account, I’d focus on Google Account Recovery and provide as much proof of ownership as possible (old passwords, devices, recovery info, payment history, etc.). Also, avoid interacting with the scammer or running the malware again. Keep copies of any evidence, including their email address and links, and consider contacting Google support directly through their account recovery channels. Hopefully Discord can help once you regain access to the email. Wishing you the best don’t give up, people have recovered accounts from worse situations.
