You can get a new certificate issued through the ssl settings. Unless the other ssl certificate has the 2022 domain listed on the alternative names for the certificate, it won't work. You will get an ssl error. It's not because of the numbers in the domain.
An admin can tell you why you were suspended. Wordpress can cause high load which can get your account suspended. If you necessarily need to use wordpress, i recommend using caching plugins or just coverting it to HTML all together.
Have you checked your spam folder? A lot of emails from heliohost are put into spam by a majority of email providers, more specifically gmail. If you didn't get it, an admin can send another one.
You can view your account status at https://heliohost.org/status/ there isn't a feature to where you can view a "plan status." The email probably went to spam, an admin can send you another invite.