Account was hacked, cannot cancel emailchange

#1

Hello, I received an email about email change on 12.05.2019 and missed it. It says:

You asked to change your email address. You can revert this change by clicking on the link below before the 2019/12/12. [ Cancel email changes ]
If you do not wish to revert the change, you can safely ignore this email.

But when clicking the link it redirects me to the login page where I don’t have access.
I can’t log in my account and open a ticket either.
Can you also please lock my account and prevent the hacker from using it?

Thank you!