Just an idea:
Perhaps a very short letter to each owner, on paper, not email, along the following lines:
Dear Neighbour,
I expect you are aware that I am in arrears with my owners corporation levies. However, I am concerned that some of you might not have been informed that I have been making regular repayments to reduce this debt from a high of about $12,000 XXX months ago and now my debt is reduced to $XXX.
I am conscious that the owners corporation needs to have levies paid to meet its various expenses and I am keen to eliminate my debt as quickly as I can manage. Owners might also not be aware that under strata legislation, arrears attract interest that is rather higher than the OC could receive from any bank deposit. Consequently, although the present situation is not ideal and I am working to remedy that, the OC will come out ahead in the end.
Regards,
I doubt that a paper letter will go unread if you keep it brief and only make these few factual points. If need be it could be followed up later with more detail or discussion about the managing agent, but for now, I suggest the short letter might cut through any disinformation or lack of information. If anyone demands proof of payments etc. then that is good because they have started talking again and you can send them a photocopy of your receipts.
Good Luck.