Have you downloaded the individual CSV files for each component of the badge? They will tell you where Etsy believes you fell short. I have always found them to be accurate, if a little unforgiving.
Thank you. However my star seller stats show that my shop has achieved the star seller badge. However it was subsequently removed by Etsy. They say that this is because I violated a policy in July and was sent an email from Trust and Safety to explain. However I did not receive an email from Trust and Safety. I have asked Etsy Support several times for a copy of the email but they have been unable to provide it. (So I achieved my star seller, then Etsy removed it, but they are unable to provide detailed info on why they took it away).