After months of trying i just gave up.

The plug-in is riddle with bugs and problems and there is no support.

Variable Products get their image from a random variation and not from the main product image.
Deleted products from WooCommerce dont get delete in your facebook shop.
The cron job fails often for large shops, it should be split in smaller batches.
Often new plug-in updates just beak everything, do not update until a good two to three weeks after the realease.

We spend 50K a year on ads and we cant get a working plug-in from facebook.