Online chat consultation access
https://class101.channel.io/home
Chat consultation hours
Hours: Weekdays 10:00 ~ 18:00
Lunch break: 13:00 ~ 14:00 (Consultation is temporarily suspended during this time)
Phone customer service information
Phone number: 1800-2109
Phone consultation hours
Hours: Weekdays 10:00 ~ 17:00
Lunch break: 13:00 ~ 14:00 (Phone connection may be difficult during this time)
Phone consultation precautions
We are not operating on weekends and holidays.
Phone calls are handled sequentially, so please wait for your connection.
When phone consultations are busy, same-day responses may be difficult.