Hi, So from 4-5 years ago I had a Minecraft account whose email address was deleted. So I couldn't log in there anymore. When I checked again his name and skin was changed. The account is now called: xIsabellla. Can I do anything to log in there again?
Just try changing the password, if that doesn't work, you should ask Mojang support. Probably. Have you reassigned the account? Another possibility: Try to create the email address again, this may work.
Hope I could help you.