@michaedavi928
I have not heard of this shipping service in the USA, and the pricing is in UK £ and €, so I think it is only available in the UK and Europe. It appears to be an app that is integrated with eBay.
https://support-ebay.packlink.com/hc/en-gb/articles/209156905-eBay-Delivery-UK-shipping-rates
You should look for help with this on the Packlink app, since it's not a service provided by eBay itself. There are links to help pages on the link I gave above. If you still need help, you should ask on the eBay UK community:
https://community.ebay.co.uk/t5/Postage/bd-p/21900000772
