When I took my Learn to Quilt class we used 100% polyester(it was donated) It was horrible. I have tried Hobbs 80/20, I was not impressed with it and I know it is a favorite on this board. My favorite is the Warm and Natural too, which I purchase at JAF's with coupons. I am eager to try Hobbs wool batting and Quilters Dream varieties.
If it were me I would try to return it, if that didn't work I would donate it to charities who quilt for donation.