You can follow along here to manage email aliases.
--please don't forget to upvote
and Accept as answer
if the reply is helpful--
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Dear Microsoft Support Team,
I am writing to you today to report that my Microsoft account was stolen, and although I was able to regain access by changing my password, I am unable to change the email address associated with my account.
Unfortunately, the person who stole my account was able to change the email address on my account before I could regain access.
I am very concerned about the security of my account, and I am worried that my personal information may be at risk. I would like to request your assistance in helping me to change the email address on my account to a new, secure email address.
I would be happy to provide any additional information you may need to verify my identity and ensure the security of my account. Thank you for taking a look at this, and I look forward to hearing back from you soon.
Sincerely,
Filip Pastierik
person's email: [******@rambler.ru]
my account name: PFILIPs Gaming
my original email: [******@gmail.com]
You can follow along here to manage email aliases.
--please don't forget to upvote
and Accept as answer
if the reply is helpful--
Hi Filip Pastierik, I hope I can help you with this problem.
I am sorry that your account was taken over.
I would recommend the following steps, if not already done.
Try to reset your password:
Microsoft has provided a page with information on how to proceed with a compromised or hacked account:
If the problem persists, I recommend contacting Microsoft support by phone or email.
In the Q&A forum it is difficult to solve such problems.
If the reply was helpful, please don’t forget to upvote or accept it as an answer, thank you.