I had deleted the mail alias I used for my sync profile. After trying to log in, I've received this message: Sorry. We’ve locked your account. The confirmation email we sent to firefoxalias@mypersonaldomain.com was returned and we’ve locked your account to protect your Firefox data. If this is a valid email address, let us know and we can help unlock your account. The link on "us" opened the default support page. What should I do please?