[Plugin: WooCommerce Print Invoices & Delivery Notes] Adding Customer Phone number to Printout

The author has shown the way in this topic : add email to invoice

please check the woocommerce-delivery-notes-print.phpfile inside the plugin folder. the right functions are:

wcdn_billing_phone();
wcdn_billing_email();

Thanks for your help on this @nyenius, I have gone into woocommerce-delivery-notes/classes/class-wcdn-print.php – which is the only one that mentions print in it. This was the free version of this woo plugin.
Are you able to give me a clue where the code is located in the file? I am not an expert with php but can’t find anything like this – and where I should actually put it! Any help would be greatly appreciated!

Path should be like this:
woocommerce-delivery-notes/templates/print/print-delivery-note.php

Any solution to this yet?

I need to find out how to add the customer shipping address, phone number and email address to the invoice. I have read the instructions above about adding the phone number and email but I am so new to this I cannot figure out how to add these things. Can anyone just spell it out – step by step for me? I would really really appreciate it.