they call every night several times and hang up when i answer the phone

This is the first day and I hope the last day I have received phone calls from this company Global Reach Int, the number is: 213-426-2763. I was on the other line when they called for the 3rd time so I hung up my phone and called the number back. A man named Jason had answered and told me that he was calling for the government and said that we were qualified for a government grant for education, home or business. Well, it sounded like a good idea so I said, "sure...education". He said he was going to send to me in the mail a package to fill out and return, but to be fair I would have to pay shipping for the package which was $1.95. I said o.k. then he wanted my debit card/credit card number. I said I don't give that info out over the phone can I pay C.O.D? He said that they couldn't do it that way. I told him again, I just don't give my info out to strangers and I would like to check them out with the BBB or the government. He then got kinda snippy with me and said, "You're the one that applied for grants online you should know who we are! Call us back when you know what you want to do." That's when I got really suspicious and decided to look them up on line and this website is what I found. I'm glad I did.