I'm sorry you had such a bad experience. I wouldn't have been shocked by the calendar--although uncomfortable. As usual, cycling is probably a male dominated industry. My DH is an aircraft mechanic and they used to get these calendars from Snap On Tools--but they discontinued the calendars as more women entered the industry.

I'm not good at speaking up, but I would have considered taking my bike halfway through and not paying. I hope you don't discover they caused damage when you get home to your local lbs. Maybe you should take some pics in case problems creep up.

Try to arrange to pick up your water bottle during the day when the manager would be there.