Advance fee loans are illegal period and in some states, so are the payday loans.   Please be aware the scammers may also claim down the road that you have taken a loan and try to extort money from you that way as well!

http://www.consumer.ftc.gov/articles/0078-advance-fee-loans
http://www.fraud.org/scams/direct-marketing/advance-fee-loans
Payday loans
http://www.paydayloaninfo.org/state-information

http://dfi.wa.gov/consumers/alerts/cashnet-payday.htm
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http://www.cashnetusa.com/consumer-notices

http://www.nw3c.org/
http://www.ic3.gov/default.aspx
http://www.fbi.gov/
https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
http://www.consumerfinance.gov/complaint/
http://www.fraud.org/
http://www.stopfraud.gov/report.html
Tip off FBI about this extortion attempt by filing form at: stips.fbi.gov/

Consider getting a call blocking device or phone.. You can google them and many are around $40.00 or so. If its a cell phone, some already have call blocking, if not, there are free apps on the web that will work for some. You can google this. If you have a smart phone, there is a free app called call control. Iphones appear to have apps also. Another one is called Mr. Number.