What is the return policy on liquor and champagne?

Non-chilled and unopened products are valid for return, given its undamaged and you have receipt ready.

In my experience here, I worked with someone at the front desk that does wholesales. I was buying a lot of alcohol for a party. They allowed me to return all unopened bottles for a full refund.

For wholesale yes

I don't think you can

I would call and ask.

I am not sure, but I didn't think you could return alcohol to any store