Can you try importing your 16-digit key to another 2fa app? preferably to a different device for example Authy, its available in both windows and mac as well as on google chrome (extension). I imported mine in authy's (GC extension) a while ago and it works fine
Their support really sucks, I believe even waiting for a month to get a reply is still fast considering that it's polo
install Authenticator Google Chrome Extension.
https://chrome.google.com/webstore/detail/authenticator/bhghoamapcdpbohphigoooaddinpkbai?utm_source=chrome-app-launcher-info-dialog
https://chrome.google.com/webstore/detail/authenticator/bhghoamapcdpbohphigoooaddinpkbai?utm_source=chrome-app-launcher-info-dialog
thank you guys, i tried authy and chrome extentions but they didn't work, they generates codes like my phone does but in poloniex i still get incorrect error. Also i tried authenticattors in 3 different phones. they always reads barcode or 16 digit code, starts generating 2FA codes but codes doesn't work in poloniex.