he's a transformer

but enough with the joking

write him a letter saying he's got 10 working day in which to reply otherwise you will have no option other than to pass it onto the hands of you soliciter

how did you pay?
credit card?

they have big expensive lawyers who will run around after him if you tell them your goods weren't as expected and you want a refund

if you didn't then citezens advice is your best bet