Hi,
There’s quite a lot of posts here already asking the same or similar questions with regards to accounts be it password problems, reset password or blocked accounts, nobody here can help since this is a community forum and the majority of members do not have access to unblock your account other than Gitlab staff (who do frequent here from time to time).
Contact them directly by opening a support ticket since it should be far quicker as account issues are not dealt with on the forum: https://support.gitlab.com/hc/en-us/requests/new?ticket_form_id=360000803379
If you are a free user, you’ll have to wait until they get around to you. It could be quick, but then again it could take a while.