We cannot stop the calls to you, but you can. Do not answer unknown calls and do not call them back. Consider getting a call blocking device (or app for your cell phone)-they're available online and start around $45. http://800notes.com/nb/search?q=call+blockers
Got a call from 323-200-1188.
Answered but the caller did not say a word.
I could hear people talking in the background but the strange caller was silent.
Spooky!