Seller says he cant cancel order

[r1guv]

After purchasing some nike air max trainers yesterday the seller informed me that they will be a week late posting and that they are actually not genuine nikes as advertised but replicas, he did  agree to cancel order but then later messaged me saying he was not able to and whether I could which of course I can't. I need the funds back so I can purchase some genuine nikes.

[plpmr]

adding to the advice already given -

contact eBay and refer them to the messages and ask them to action a cancellation and refund on the grounds the seller has admitted to violating eBay rules and the law by admitting to selling fakes.

Point out to eBay they are now fully aware of this criminal activity on their site.