caps lock is to the left of the keyboard, give it a tap, there's a good chap.
given that the seller appears to be young (will get dad to deliver) chances are they've not had a day off school yet to get to the post office, and living in Skipton, the post office there probably shuts early on saturdays. Grante, good communication can solve this, but they might be scared/ stupid and not know what to do. you know what kids are like, the money's been spent, and now can't afford to post etc. doesn't take much effort to track someone down, find an address and send a polite letter requesting return of goods or cash in 7 days or you will take legal action. address is to Mr and add their surname. Keep it polite and formal and I bet your wheels will arrive.