Did you sign onto your download account with the exact same userID you used for the Advantage account?
Go to this website and sign onto your download account - https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
If there is not a 2017 download showing in your account then you will need to contact TurboTax support for assistance.
Use this website to contact TurboTax support - https://support.turbotax.intuit.com/contact/
Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax
Note - Support is open from 5am to 5pm Pacific time, Monday thru Friday