@Hank thanks for reaching out!
With our 100% Satisfaction Guarantee, we stand behind everything we sell. If you're not satisfied with your REI purchase, you can return it for a replacement or refund within one year of purchase, except for outdoor electronics (which must be returned within 90 days of purchase) and REI Garage Sale items (which are sold in-store at our Garage Sale events - these are final sale). Our guarantee doesn’t cover ordinary wear and tear or damage caused by improper use or accidents.
As you've described your tent as new and unused, it sounds like you'll be able to return it! Here are instructions on how to make that happen!
Hope this helps!