See below article for how to log in to your Sportsbet account. 

I have a BetEasy account only (I don’t have a Sportsbet account). What details do I use to login to my Sportsbet account?

If you have a BetEasy account only, your username for your Sportsbet account will be the username or email address you used for your previous BetEasy account

I have a BetEasy and Sportsbet account. What details do I use to login to my Sportsbet account?

If you have a BetEasy account and a Sportsbet account, we will contact you directly with your personal login details.