Integrating Droppshiper's datas in Wix?

Hi,

Alongside Modalyst, I’m using a droppshiper which doesn’t have an integration app. I have to manually order whenever a client decides to order a product from this dropshipper. However they offer CSV, Json and xls files.
How can I synch them so that the stocks are accurate on my website?

Thank you in advance for the help! I’m used to work the easy way (apps integrated), so I’m quite lost.:neutral_face: