Hey WGT,
Just clicked on 'purchase new sleeve' during a game as I got down to 1 ball left and the error message "oops, something went wrong, visit pro shop...." appeared. I did not get my sleeve of balls and yet WGT took my 300 credits. Please return my credits or a sleeve of Callaway i(z) legend balls..
Edit: The balls have appeared in my equipment, so no action required.