Check your Course Of Sales from your broker, do not follow the bots to sell your share. The bots normally sell small unit of shares.
And the fake sellers appear and disappear on the "Sellers" side with large amount of shares.
Check your Course Of Sales history from your broker, here is the Comsec one:
https://www2.comsec.com.au/Private/MarketPrices/CourseOfSales/CourseOfSales.aspx?stockCode=NEN