Prodigi's API is not integrated in my Wix shop

Allow me to elaborate. I already have a website on Wix, but have very recently added a store to sell greeting cards I have designed. I'm using a print-on-demand company (Prodigi) to print and ship the cards for me. However, the logistics are proving very difficult and time-consuming for me, as: a) Prodigi's API is not integrated with my site, so I am having to manually upload orders in a spreadsheet, and b) Every time my customer wants to add a personal message to the card, they type it in a box when placing the order, and I have to then manually add the text to my design before sending to Prodigi. I want this whole process automated, so that Prodigi receives my card design, INCLUDING any personal greeting, immediately when the customer places an order. Is there a way you can help? Let me know how possible this is. Thank you