Three questions that narrow everything.
TEST ONE: DOES CPANEL LOAD?
Visit yourdomain.com/cpanel.
If cPanel loads, the server is running and the account exists. The problem is in your site.
If it does not, the problem is broader: DNS, the server, or your own connection.
TEST TWO: DOES A PLAIN FILE LOAD?
Create test.html in public_html containing one word, and visit it.
If it loads while your site does not, the server and your files are fine and the fault is in your application code.
TEST THREE: DOES IT WORK ON MOBILE DATA?
Turn off wifi and try from your phone.
If it works there but not on your usual connection, your IP address has been blocked by the firewall. Open a ticket with your address from whatismyip.com.
WHAT EACH RESULT MEANS
cPanel loads, test file loads, site fails: application problem cPanel loads, test file fails: server configuration or permissions Nothing loads, works on mobile data: you are blocked
Nothing loads anywhere: DNS, suspension, or a server incident
THESE THREE TESTS
Take two minutes and eliminate most of the possibilities.
