lol sounds like Paul Wilson's been on ebay,
i have a shop on there, a few weeks ago ebay crashed and wiped 80% of their accounts.. luckily the back server came on a few seconds later.. but any purchases in the time it was off went through but werent regonised by ebay.
But if you paid and the product arrived then i shouldnt worry about. If your not happy then the ebay product cover will apply up to the value of £500. you need to have the item number and fill in a disput form on the site... normally get back to you in 24 hours.
If paid with paypal you have 31 days to to make a claim.
Again fill in a online form.