A search for "Amposo" returned a number of hits, mainly sites questioning its legitimacy. Unfortunately it appears to be a complete scam. If the gadget had cost £75 or more, at least paying by credit card would have given you some protection, unfortunately that's not the case here. So sorry to say, the OP has lost his money.

The only suggestion I can make to all is to look at some of the whistleblower sites, they give some good tips on how to spot a likely fraud.