Authenticated Trainers - I think are fake - what to do?

[phantom-design]

I purchased a pair of Common Projects Achilles Low from a seller on eBay, they went to the authenticator and came with the authenticated tag attached, however I have had several pairs of these trainers over the years and these ones are a size smaller and the stamping on the heel areas is quite a lot bolder. I have contacted the seller but had no reply - what can I do as I believe they are fake even though they have been authenticated by eBay?

[**peaseblossom**]

You can still open a return to get a refund.    Here is info about it:

https://www.ebay.co.uk/help/buying/default/buying-authenticity-guarantee?id=5470#:~:text=If%20an%20i....