Keeps calling every two hours leaves no message getting really annoying.

Its a scam.. I called and checked on them.  Complete scam

Caller called my 13 year old and was asking her name and who was with her and asking about her sister who is 23 and asking what her parents were doing and my daughter told him she didn't know and they called her a liar and said we was setting right by her. He kept telling my daughter she had a beautiful voice

http://800notes.com/arts/I2neMkbUAAo/where-to-report-phone-crime

For 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.

For text messages: forwarding any text message spam you get to the short code  “7726,” which spells “spam” on most phones, to alert your network operator to the abuse. ATT won't accept 7726 But they will accept BLOCK and return a message that the web site is blocked. forward the texts to 7726 or BLOCK, depending on your phone carrier.
http://www.att.com/esupport/article.jsp?sid=KB115812

Report your callers here, not just to the DNC alone:

https://www.ftccomplaintassistant.gov/#&panel1-1
https://esupport.fcc.gov/ccmsforms/form1088.action
https://complaints.donotcall.gov/complaint/complaintcheck.aspx?panel=2

By State DNC lists:
http://800notes.com/res/DoNotCall.aspx

they need to stop calling