We got ripped off. My dad purchased a 10-time pass...

We got ripped off. My dad purchased a 10-time pass in August. With it he purchased a buddy pass add-on for $49 that was described on the website as one free friend pass and 5 buddy passes that could be purchased for $25 each. However, now they are claiming that the buddy pass add-on includes only 3 buddy passes for $69 (peak) or $49 (midweek) each in addition to the friend pass (which is not much of a deal considering that's only $10 off the regular price). We have no way of proving what we originally purchased, because the deal is no longer offered and the receipt only says "buddy pass add-on," with absolutely no description of what that includes. They say they can't find any record of this deal and have refused to make things right. I'm very disappointed.