How do I report a seller for selling counterfeit products?

[graemeshartley39]

A beaurty product that I bought for my wife in April 2020 is a counterfeit. 

I am unable to report this to eBay on any of their portholes. How do I start a dispute?

The product code is no longer recognised but I have this seller and the product in my purchase history. 

What do I do next - any ideas?

Thanks in Advance

[tsmgmd]

Have to ask why you have suddenly decided a item you bought going on for 7 months ago is fake..