"complaint hotline" is correct and usable in written English.
You can use it when you're describing a service that allows customers to call in and make a complaint. For example, "If you are unhappy with the service you received, please call our complaint hotline for assistance."
Seventeen months after it was announced, the institute has no staff and no appraiser complaint hotline.
The city's 311 complaint hotline got 2,363 calls complaining about secondhand smoke in residences from July 15 , 2011 through Sunday, city officials said.
Its work around tax, for example, has led to the Anambra government setting up a complaint hotline where illegal tax demands can be reported.
Best of all were the quotes from the jilted would-be Scratch n' Match winners, many culled from a complaint hotline that the Post set up to catalogue all those deferred dreams.
In any event, the threat of increased noise and emissions is worrisome enough that residents have formed an Alliance for Sensible Airspace Planning, with complaint hotline numbers posted on the town's Web site.
Meanwhile, the studio that produces House of Cards, Media Rights Capital, told CNN that it had implemented "an anonymous complaint hotline, crisis counsellors, and sexual harassment legal advisers for the crew".
The party is fast learning the techniques of focus groups, opinion polls and complaint hotlines.
By building and licensing software that has the specific purpose of measuring employee engagement, they allow companies to do snap polls, target specific teams and demographic groups, offer employees anonymity and complaint hotlines, and in some cases allow whistle-blowers to bypass C-suite executives and go straight to the board of directors.
They will also be required to grow all their cannabis on-site, test it for pesticides, provide written notice of their existence to all neighbors within 1000 feet, maintain 24-hour complaint hotlines, hire unarmed security guards to patrol a two-block radius, keep 90 days of security footage and fulfill a number of other registration requirements with the city.
Afghanistan's intelligence agency, the National Directorate of Security, set up its own electoral complaints hotline.
The Federal Communications Commission said on its website that it would shut down most operations on Jan . 3 including its consumer complaints hotline.
