Shit Jersey on eBay - advice please

But how can it be proven how he washed it? Im my opinion he washed it at too high a temperature, damaging the top and wants us to rectify the damaged he inflicted to the jersey. If the correct procedure had been followed then I'm sure it would have been fine. As previously stated we've never had any -ve feedback about the colour running in these up untill now.

I don't think anyone would wash any top (let alone one meant for athletic activities) on anything more than 40C.

If he says he washed it in cold and it ran then surely your first response should be to check your stock to ensure that nobody else will receive shitty products?