Sky Park Harties disappointing experience

The Harties Cableway was awesome! but A real disappointing experience at Sky Park with the staff. I paid for a package that included a zip line ride for my son. He was afraid when he got right to the top for the long zip line, so I asked if they could allow him to go for the shorter zip (cheaper and more appealing to kids) but an arrogant staff member insisted that could not be allowed because I did not pay for the shorter rider! Does this make any sense, I paid for the more expensive one and nicely asked if they could accommodate a child on the shorter one and he blank out refused and said it's not allowed. Common sense is a luxury these days. Really not a pleasant experience at Sky Park.