Dafer University USA Scam targeting English language learners Internet

I am an ESL teacher in Virginia.  One of my students came to me saying an individual from "Dafer University USA" had called him and sold him an expensive English language home instruction kit for a "reduced" price.  He asked for a lot of information from my student including the names and phone numbers of two friends.   Now the cost of this product has become higher than what my student expected and he does not want it.   The Dafer University person has told him the product has been shipped (he has not received it) and that he must pay or he and his friends will be taken to court!  Naturally my student is very upset about this threat.   I see on your website similar complaints against this organization.  ESL students and all people desiring to learn English should be warned not to get involved with this organization.