How to automatically assign SN code to email from the used order billing email?

Hello, i use your plugin serial codes validator and i have a problem with the orders and the serial numbers that are corresponding to each order. How can i make the plugin to automatically assign the appropriate serial number based on the order number and the email that the user provided in its billing information?

And at the moment in my website when someone orders something – a code is received from the plugin for it. When the user is logged in and i use this shortcodes:[sngmbhSerialcodesValidator] &?[sngmbhSerialcodesValidator_code]
the last used serial-number that was with the order of the item do not appear. So its not registered to the same user with the purchase.?
How i can assign this codes to the appropriate customers/users and if possible can it be automatically?

Thank you in advance for your help

PS: at the moment i am still setting it up. I’ll have more than 500 SN codes of my products so some time in the future 100% ill purchase the paid version. So please help me set it up.?
My boss has money – so he will pay for the plugin, but i have to show it to him working before he decides to buy it. At the moment i can not set it up properly.?

The assignment of serial code to an order is hard. 

Btw i can see the serial-code in the order details – but i can not see it via the shortcode validator or the shortcode list. This means that its not assigned to the email from the billing email field. 

Hope you can help me . Thank you in advance


(i use woocommerce and all the plugins from the tutorial video that you shared) + elementor.

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