Consider maybe getting a call blocking device or phone.. You can google them and many are around $60.00 or so.
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https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2
http://www.consumerfinance.gov/complaint/
http://www.stopfraud.gov/report.html