Sounds like your pro shop made an error that they should correct. But, I wouldn't give up on the new ball until you've tried different surfaces, maybe a weight hole, etc. You never know. Had a similar, but different, situation w/ a teammate, a pro shop error. He ordered a 16 lb Phenom Unleashed. Shop got it, drilled it, and his friend picked it up. Turned out it was a 15 lb'er. Shop stood by their mistake, but asked him to use ball, change surface, test reaction on different conditions to be sure he liked the pin, cg, etc. They were only going to plug it and sell as used anyway so they let him experiment for a while. He did experiment and found ball went longer than expected, so when he got the 16 layout was changed a little. Shop showed integrity, my buddy is even more loyal to them than before, and they get alot of referral business for doing the right thing.