How to arrange a time for an on-site repair?

How to arrange a time for an on-site repair?
Fixes香港維修

The working hours for Fixes are 9am – 9pm. During this time, our call center agents and quotation team will manage your repair enquiries and arrange for a repair time. However, engineers’ on-site repair times are 12pm – 7pm; if you need to arrange for an engineer to visit after 7pm, there will be a one-time additional extra charge of $200.