Report them here:
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/
And you also might consider buying a call blocking device or phone.The T-lock Incoming PRO Call Blocker sells for under 60 bucks on Amazon and can block up to 1500 numbers.
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=call+blockers
So far I have received 12 calls from 323-204-7258 and now it's 13 non stop calls. No messages just repeated calls. Now 15 calls so I'm turning off my phone at 8:35pm.