I just fell for the Nigerian Scam, few tips that might help.
1-Report to the police as soon as possible and get a crime code number.
2-Call the delivery depot, in my case Coventry 08442096159 they will be able to stop your parcel from living the country as long as you have a crime code. I was a couple of hours too late for mine, as nor ebay, paypal or Royal mail pass on this information. All they say is that they can't stop it.
here is a web site where you can find more depot phone numbers:
here is a local rate number for ebay:
to find other local numbers just search for saynoto 0870 or whatever the first for digits are and you should be able to find them.