We need 1000 images adding to eBay listings

We have created an ebay store and added products to it using the file exchange functionality, however the thumbnail images are not showing at results level for the end user/buyer. We need someone to either automate the addition of the images or add them manually.

The thumbnail image is generated by the first visible image on ebay. All the images display as they should do at product level, just not on the results page.

https://www.ebay.co.uk/str/motorcyclesuspensionspecialists

Who can help?