MY POLONIEX ACCOUNT BEING HACKED AND LOCKED BY 2FA AUTHENTICATION

This happened to me 5 days ago on poloniex and hacker wants to take about 0.9btc,but it was not successful due to he was not able to break through my email,i have sent poloniex all i have to remove 2fa authentication please guys who can help me,am like a dead man here.
please someone should help me!!!!!!!!!