There maybe one way to get their attention if you paid by credit card, a section 75.
Section 75 of the Consumer Credit Act 1974, it protects you against faulty goods, breach of contract etc for up to 6 years from the date of purchase, the law holds the credit card company jointly liable with the retailer meaning you can claim a refund from your credit card provider if you are unable to get it from the retailer, its a straight forward process and one that any retailer should not ignore as the card provider simply issues a charge back against them.
You can obtain all relevant information from your card provider or have a look online first so as you understand the process, the process is very much weighed in your favour.