Hey there @nmf I see that you have a problem that just went out of your hands! You can contact firstname.lastname@example.org dirctly. He's the connoisseur in terms of Shopping related issues. I'm sure after contacting him, you'll be through it in no time.
I'm from CedCommerce - a group of coders and tech enthusiasts trying to help eCommerce guys with their store set up. You can reach out to me anytime for any kind of customisation ; add-ons or drafting sales/marketing/social media strategy! We have helped quite a few entrepreneurs in their journey, and if you need a helping hand, we would be glad to offer one!
Ps. I'm just a message away!
Wish you luck for your Shopify journey! Cheers! .-.