Last year i know 2 people who had the same problem with " what a mesh computers". I didn't find out about thier difficulties in securing refunds for faulty computers until about 4 months after they had starting trying.
As i mentioned in previous posts, i have recently left the Military Police and have a wealth of knowledge and experience in fraud cases, as this is what this is classed as. Also my little sis is a graduate manager at HSBC.
So for any type of transaction over the phone or internet where you pay upfront for the goods and either do not receive the goods in question or are not as described are not only covered by the distance selling regulations (DSR), but also by your bank. As the DSR are so easy to get around the banks had a piece of legislation passed called
ADVANCED FEE FRAUD (I'm not shouting)
So if your goods don't arrive or are not exactly as described then the seller has defaulted on the contract and MUST offer a full refund with no penalties or charges incurred. Go and tell your bank what happened, they will then start an investigation.
Investigation basically consists of the bank phoning the seller and asking why a refund hasn't been given, (note the seller can have up to 30 days to refund), then they will tell them about Advanced fee fraud and give them a week to return the money, less they end up getting prosecuted.
Your bank will look after you in these matters, my lil sis has personally dealt with about 250 of these enquiries.
Hope this helps.