providing feedback

[dgctwenty]

I've been asked in an eBay email to provide feedback for 3 items I've bought, however they do not appear in my ebay purchases or feedback section. I definitely bought them from Amazon Marketplace but there is no evidence on the site of me doing that! One of the items is not what I ordered ( cd) . Wrong cd in case

[john1297576]

I do not understand how ebay can be asking for feedback for items bought from Amazon.

Surely it is not worth buying from amazon if they also sell  on ebay?