99% of the time if BOTH email and website are down this is due to your domain expiring with your domain registrar.
Its important to note we aren't your domain registrar (where you bought your domain).
This could be godaddy, bluehost, google domains, hover.com, 1and1.com, network solutions, etc..
You'll want to contact them to get your domain in good standing then re-point your domain's nameservers or A record to get your site working again. If you have any questions please feel free to email us here: firstname.lastname@example.org with an alternative email or phone # where we can reach you.