I am well aware of the issues - had the same with PayPal - so they are all useless when it comes to it!
The site is limited to orders only from Ireland, so this helps slightly.
I will give them a chance, and will pull the plug if we get more than a few claims!

On the PayPal claim, guy made 6 orders in a short space of time, a matter of days - claimed on 3 of them, and won - argued with PayPal how are the other 3 genuine, etc, but talking to the wall - was taken for 500 quid plus. Their argument is that its the bank on the buyers side, final decision - which is a joke! Had all the info presented, order history, he'd used a discount voucher I supplied to him for his larger orders to use the next time, which he did, and claimed unauthorized transaction on an order he used a discount code - if it was unauthorized, why would he be worried about a discount - PayPal wouldn't entertain it!