Funnily enough, the phone menu prompt is different for the Cantonese and English hotlines. The Cantonese hotline lets you enter your MPC membership number while the English hotline doesn't have this option. The English hotline on the other hand lets you choose to have an agent call you back if you no longer want to wait in line, however this option is missing on the Cantonese hotline. The hotline is really becoming even more farcical.

Would also like to add that the Whatsapp feature is in general useless as it only provides you with generic information that can also be found on CX website and doesn't actually offer you to speak to an agent for specific issues.