helpline
noun [ C ]
COMMUNICATIONS (also help line) uk/ˈhelplaɪn/ usa telephone service provided by an organization or company to offer help and advice to people:
call/ring/phone a helpline Call the Inland Revenue helpline with your queries.
set up/run/operate a helpline A telephone helpline set up by the administrators was swamped by 9,000 calls in three days.
a helpline for sb The Counselling Service runs a helpline for people with debt problems.
help line number
a 24-hour helpline
a consumer/customer/legal helpline
a free/emergency helpline