yes i know i should have taken the time to back the disks up. Its all new to me and the retailer didnt give much advice at the time. i didnt really think that a few months down the line i would have a major catastrophe on my hands!!
your retailer, doesn't have much in the way of customer care skills.
ok some customers would resent them asking why they wanted a nas setup in that way (raid 0) but many customers will not know the full implications that that particular configuration poses. As a responsible seller of hardware it shouldn't be difficult to determine those who are technically savvey and those who are not up to speed.
if you have to go down the route of data recovery expense then your retailer is a better bet than the manufacturer if you are trying to get assistance in the costs, they wont be happy but if you bang the table it might get results especially if you can show they mis-sold you the kit.
Many system boards now offer raid 0 as an option in the disk configurations in pc's a mistake in my opinion as many members of the public will find a single drive failure will render their systems useless, and the loss of o/s and data.