People who are looking for means to apply for the US Visa, often contact the agents. They should never do that. Most of these agents are frauds. They mint money from your hard earned income and vanish one fine day. The better way out is to contact the US Consulate directly. You can do that either by visiting the US embassy or just click online. The online method is not known to many people but this is perhaps the fastest among all. That is because unlike other countries, the US people are very particular of their online works and assignments.