I did fail to inspect the rockers/shafts before purchase, and that’s on me. I couldn’t have seen that they were different ratios until I got my calipers on them, but in the end you’re right; I failed to inspect them on site. I trusted the seller.
You got your money back, so return the shafts. Only a dishonest person would keep the parts after a refund. Do the right thing and return the parts. You do not have a leg to stand on.