@vitormhenrique please don’t spam the community forum by posting the same thing in multiple topics.
I’ve deleted your duplicate post.
The Legacy system is not offline - yet. It will be taken down on 31st December (78 days time).
If your account is unavailable then that will probably be because it was idle and was the deleted for GDPR compliance reasons.
Have you checked your Spam folder?
Are you using the same email address that was originally used to sign-up to Blynk?
I guess that would happen if your account went idle and was deleted. Multiple notifications were sent to Legacy users with active accounts.