A ticket is tied to your account - whoever answers sees your services and history, which a plain email cannot offer.
Choose Help → Open Ticket: pick the department, a subject, the priority and - this matters - the service it is about. Attach screenshots: a picture of an error beats a description of one.
What gets a problem solved fast:
"The site is down" usually takes three rounds. "yourdomain.com shows a 500 error since about 14:00, right after a plugin update" is often solved in one.
Never send passwords we have not asked for. For most work on your account we do not need one.