Usando o Outlook para Android para gerenciar e-mails pessoais e a agenda
(I will answer you in English based on your previous message. As a friendly suggestion, posting in Portuguese may help your question reach a wider audience and increase the chances of receiving assistance from other community members.)
I'm really sorry this happened. Having years of email wiped by someone else is awful, and the chatbot loops only make it worse.
Being honest first: Outlook.com keeps purged mail for about 30 days under "Recover items deleted from this folder," which only shows on a PC or Mac browser, not mobile. If that view is empty on a computer, there's no further restore. Microsoft doesn't keep a separate backup of personal mailboxes that support can roll back to.
Still, get an agent to confirm and open a case. Sign in to any Microsoft account, go to support.microsoft.com/home/contact, type "agent support," click Get Help => Ask our Support Assistant. Request to speak to a live agent then click Contact Support at the bottom. Pick Other Products, then Manage Account Security, and choose "Chat with a support agent in your web browser." US business hours.
Also check Settings > Mail > Rules and Forwarding for anything you didn't set, and use "Sign out everywhere" at account.microsoft.com/security. Don't pay the Bitcoin demand; report it to your local police.
Note this is a user-to-user forum, so we can't access back-end systems. Happy to help further if the chat route fails.