Datalink Infotype — cheaters doing illegal work

There is a company name DATALINK INFOTYPE who doesnt have official website or official full address.they making fraud with people.they also did same with me.now they are asking for money.though having so many complains against them they are not yet stopping to make fraud.they are taking advantage of people to do their work without any payment.the send me notice on mail and trying to scare.they are themselves wrong, although they try to scare.this company doesn't have any legal certification and they are taking the advantage of internet for making money. They are disturbing me n so I am willing to take action against them through cyber crime branch.so please be aware..!!!