Received a call without name

This fone number has called me asking for pay 400 dollars and more 99 dollar to pay my permanent residence.

I didn't answer it but i called back and it said it was an immigration support line...??

This call was made to me after I realized that on top of the $149.00 that immigrationdirect.com was going to charge me for filing a form there would be another $300 something added by Immigration I stopped filing with them.. Your going to have to pay Immigration anyway, so why pay these people another $150 to just put your info in when you can go to the government site and do it yourself??? They call so that they can get money from you.Make sure you read the fine print at the bottom of their page before you give them your credit card info or other payment info.

I receive calls from this number ( 415-946-5707), no name listed.