I had to change the date of a MH booking done on-line. The change was done by telephone because the MH website would not retrieve the booking and thus not allow me to change the date of flying. I now want to check seating and meals on my new flight dates.

I have a new e-ticket but the booking reference remains the same.

If I try to check/change my seats by using the manage booking button on the MH website, the original booking shows up with the original eticket number.

How can I "manage" my new booking? I cannot even check which seat(s) I have selected for the 2 flights. How can I select a "special" meal? Thanks in advance for any clues/help.