Your account is in good standing (active Hobby plan, billing is current, $4.49 in credits remaining), so the pause was not caused by a billing issue. Restoring paused services is a manual process - you must redeploy each affected service yourself. Your "web" service in the "cardionovaonline" project shows a successful deployment from 19:14 UTC on May 19, so if your app is still inaccessible, try triggering a fresh redeploy from the service's deployment page. More details here: What do I do if my services were stopped?