Hi - I made a multi-city flight booking (4 segments) with China Eastern airlines on their UK site. I now need to change the last 2 segments and when attempting this online through MMB it says multi-city changes must be done over the phone.

I have tried the UK numbers on their website, one of them works but none of the options connect me to anyone (just beeps and disconnects). The other number isn't valid and doesn't connect. I tried their Shanghai number via Skype but it doesn't connect either.

Does anyone have any idea the best way to get in touch and make changes to my ticket? Thanks!