"support hotline" is correct and usable in written English.
You can use it when referring to a service or resource that provides advice or assistance to people who are experiencing difficulty or distress. For example, "If you're in need of help, call the 24-hour support hotline for assistance."
If you use a different firewall program, check your manufacturer's Web site or technical support hotline for information on compatibility.
(Upon informing a receptionist of this problem, she curtly scribbled down the phone number of a technical support hotline and told me to call it).
If you'd prefer to remain completely anonymous, then Nightline, a listening and emotional support hotline specifically for students, could be an option.
The Rape, Abuse and Incest National Network reported a 33% increase in calls to its support hotline during the weekend following the release of Trump's notorious Access Hollywood tape.
The National Alliance of Mental Health's support hotline.
And it will start a technical support hotline in order to provide assistance to frustrated consumers.
If they hawk complex products to consumers, the expenses of maintaining their own support hotlines (one customer call costs them about $30) will eat into their profits, and customers may end up angry at the brand anyway.
Tech support hotlines are anything but hot.
Moving in tandem, the government is rolling out mentorship programs, online libraries and support hotlines for budding entrepreneurs.
Many of the changes Uber agreed to in London are worthwhile: 24-hour telephone support hotlines, better contact with the police, better reporting of incidents, imposing limits on hours worked before taking a break, hiring independent directors.
However walk-in assistance centers and live telephone support hotlines will be suspended during the shutdown.
