Are these socks 97% wool as the description seems to imply?

Ms. Dallas, our wool socks are 67% Merino wool, 30% nylon, 3% spandex. If they were 97% wool, the socks would have to be sized like a shoe. Most all US manufacturers include stretch nylon so that socks can stretch to fit a size range. Our range is to fit 8 to 12 mens shoes size. Thank you for your question. Carol Boardroom Socks Inc.

Got wrong color. How to return?

Never had an issue with any returns just send them back. I have called in before returning the item. Don't know if that makes a difference. Suppliers to Amazon do not want to lose Amazon's confidence.

How well do these socks stay up? i have purchased other high % merino wool socks and have no problem with the quality, but they don't stay up well.

I have had no problems whatsoever with these staying up. I'm wearing a pair today, and they're still exactly where I put them this morning. (I will note that every pair of over-the-calf socks I've ever worn, regardless of the brand or fiber content, stay up fine--another reason to go for OTC instead of crew length.)