CID = MEDICAL SVC GRP HARASSMENT Nationwide

Calls repeatedly all day long.  Normally rings only once, then dispersed by NOMOROBO indicating it was a robo call.  Today it rang 4-6 times so my wife answered it to tell them to quit calling our number (VOIP landline from AT&T).  The woman said this is so-and-so (couldn't catch her name) and this is a recorded line.  My wife told her to quit calling this number, you are harassing us.  The woman said she was going to call us back.  Wife said this is harassment and she was going to report them to the FBI.  They've "only" called back seven times and it is only 3:30pm.  Each one of those calls only rang once and NOMOROBO diverted them.  They don't get discouraged.  This has been going on daily for weeks.

What can we do?  They know nobody can track them down and even if you did, they are probably outside the USA and we can't touch them.