Hacked Microsoft Account Recovery with Semi Access

I'm at a complete loss and it is infuriatingly ridiculous. I am entirely unable to get a hold of a human being at Microsoft and am being turned down by automated responses nonstop. So here's what's happening: My Microsoft account has been hijacked (obviously not this one) for its valuable Minecraft account and has now been sold. I am logged into my account via my PC, have full access of the main email address, but I have been locked out of my account using the alias email. Whenever I want to log in to my account, it wants to instead send a code to an email address I do not own and can't access. I have tried the Sign-In Helper, the Recovery Form, the hotline, the support email without any result, let alone a non-automated response. I sadly don't have the Recovery Code of my 15 year old-ish account.

Since I still have full access of my email address I get updates of security info being changed and what not. Last month a stranger sent me screenshots of someone trying to sell my Minecraft account, for which I myself have received multiple buying offers, and voila yesterday I received notification of my alias mail address changing followed by Minecraft server apps being added to my Microsoft account. While I had already given up retrieving my account, whenever I get notifications my heart sinks a new while some hope sparks up again. Do you people have any idea of what I could do? I don't even rule out legal actions at this point. While I do of course have the email address of the hijacker and the buyer, I fear that contacting them results in me being locked out permanently.

I'm just begging to catch the attention of anyone involved with Microsoft. This being walled out with automated responses is killing me.