I also got caught up in this Scam, thankfully I used my bank's visa debit card. My Bank recommended that I close out this card and have a new one issued so the charges will not be allow to go through. Yes I am out of the prior fees but I will take that as a lesson not to get into a scam such as this again.

one more thing to add, my husband does work the USPS and he said this is a fraud using the US Postal Service and he is thinking on turning it over the the Postal Inspectors.