I guess most bookings at AirAsia will not cause any problems, but IF you encounter a problem then you're screwed and have to deal with their virtual assistant BO, who has only limited knowledge and "is still learning", as he himself acknowledges during the chat.
For the rest one cannot contact AirAsia by phone, I tried the Thai service desk (voicemail) that spoke in a subdued voice.
Live chat with a real person is also not available anymore.
Be warned !