Iso Air Service — job

Address:

Pearl 104 urbana jewels apartment, Urbana jewels apartment, Muhana mandi market, Jaipur, Rajasthan, 302026

I have received two same mail from the same company name called iso air service. But in one mail it is saying me to pay 1500 and in another email which is saying me to pay 600. So i am totally confused whether it is original mails from company or it is fake mail from any one else and in that mail it is written as with in 24 hours we have to pay for the company. But until we clarified how can we pay without knowing.