fraud

I have a friend that saw an ad on tv for cash for gold she contacted them and they send her an envelope with in 2 days. She send it back the next day with $300.00 worth of gold. It has now been 2 months they say that they have not yet recieved it and that she should just keep calling back. she is now terrified that she will be out her jewerly, and the money she desperatley needed to feed her kids. If anyone is thinking about using these scams please don't. p.s. dateline should do a show on it unless they already have and i and her missed it.