You can have back the credit spent, by clicking on the Undo. This will also revert the added products to the store.
To check your Imported product/s using the Add Product feed, follow these steps:
1. Identify your tag in the Feed Setting > Advanced.
By default, all your newly imported products will be tagged with "new-××××××".
×××××× represents the feed ID
2. Navigate to your Products page on your Shopify Admin page.
3. On your product search bar, Filter by Tagged with and paste the same tag in Stock Sync.