Does seem puzzling that your emails are being ignored. You don’t say whether you are part of a large or small scheme – which may make a difference if you decide to call a EGM. In NSW you need the strata committee to request a EGM (sounds unlikely from your comments) or you will need to obtain the signatures of 25% of lot owners.
If you can arrange an EGM then you can place motions on the agenda to remove the current committee, to allow electronic distribution of notices and electronic voting so that you can fully participate whilst overseas and know that the majority of owners support this view.
Any efforts to dismiss a committee however must be carefully thought through as pushback is likely and may not be pleasant. Having said that, I can assure you it can be done – having done it myself when the majority of owners of my scheme believed me when I explained that the current committee was in a stalemate (It was wonderful to have the committee sacked, then have those that were doing the right thing reinstated and others removed).
You will need to be prepared to attend the meeting in person and make the case for all the motions yourself.