Appointments + not functional

I get shortcodes, but the page with dozens of shortcodes + iterations for appointmnets + is a hot mess. My attempt to modify the shortcode as suggested just failed and the shortcode (various tested) on its own pulled nothing so I dropped it, but surely there is a "best practice" or regular way or cheat sheet to set up appointments+ for a user to book appointments and pay for them. What am I missing?

I've tried App_combo and that only offers appointments for the trailing week which isn't very functional.

http://prepwise.staging.wpengine.com/my-account/