Well that's an interesting and thoughtful name to give to your minis company. Can't say I've ever heard of them before, I'm afraid.
The website boasts of their pride in customer service, so hopefully you'll get it sorted out, provided nothing untoward has happened. I just took jaytee's advice and looked on TMP. A poster from the company calling themselves StoneMtnMinis posted there on the 29th of April. So it seems like they're at least still alive.