How can I set a limit of 8 products per customer?

Re: Order #39889, placed on June 10, 2020…

I have installed the plugin on lightinnerlight.com, where we use e-commerce to take orders for FREE books.

We want to limit

1) no more than one instance of each product (not more than one copy of each title) order per product per user (that worked with the free version).
2) no more than 8 products lifetime total per customer.

The formula I set up is [alg_wc_mppu limit=”8”]

It is not working and since I set it up we have received many orders for more than 8 products from a customer.

I can send you screenshots of each of the settings or give you WP-admin access. I got a lifetime liscense and appreciate your help in getting starting using this plugin.