How to connect two Wordpress plugins?

Question

WordPress

In general, the essence is this.
There is a Woocommerce Addon Upload plugin that allows the user to upload a file in the product attributes (this is necessary for a clothing printing site).
And there is a second Art Woocommerce Order One Click plugin that removes the Add to Cart button and instead adds a One Click Buy button.
The second plugin, after clicking on the “buy” button, offers the Contact 7 form.
The user fills out the form, submits it, and the data (selected attributes and data from the form) is sent to my mail. But!! The problem is that, in the mail, everything comes in the letter except for the file that the user uploaded in the product attributes (directly pictures for printing on clothes)
Tell me how to solve this problem.
I will be very grateful!

Answer 1

Please tell me how to solve this problem.

1) Learn php, figure out how WP and WC work, get into your build code and fix everything. because no one in their right mind will repeat your configuration and look for the reason.
2) Go freelancing and pay someone who can