Your host’s response is about “issue with login”. The problem is far more than this.
If this were just a matter of your WordPress users table being deleted:
1) The public website would work normally (or at least you’d see a WordPress error screen)
2) You’d be able to get to the WordPress login page, but you won’t be able to log in.
But neither of these is happening on your website.
When I check the domain you provided, ALL pages give a 404-page-not-found error. Even more mysterious, this error page is not from WordPress, but it’s pointed to a Google error page.
So the problem is much more than the inability to log in or an SSL protocol error. That’s why I asked you to get in touch with your host to have this resolved.
I’ll suggest you restore the backup as suggested by your host.
If you don’t have a backup, get back to your host (as they mentioned in their last response) and explain the situation as I’ve explained above. Point them to this forum post if necessary.