Appointment calendar with/or User point system plugin

I am sort of new to WordPress and site building. I have been working in my site for 1 1/2 months and learning new things every day. I’ve been trying to find a plugin that can help me, but can’t find one.

I need a plugin or a way to have a user point system, where I can sell either points, tokens, or credits to my members. With those credits, my members can book classes in my website. I would like to use a calendar where my members can book classes at a specific date and time. These booking would be in 1 hour spaces fixed. When they book this class, automatically credits would be deducted from their credit balance according to the amount of points required for class.

I cannot find any plugins that allow users to have purchased points account available for spending in booking classes or setting any type of appointments. Could not find any that would allow purchased points account where I can manage point manually either. I do not know if this is something that would be integrated with a shopping cart, with a calendar, or does not exist as a plugin.

I would greatly appreciate any feedback.