Modern technology has given telescammers the tools to call you.
Since those telescammers are criminals, they ignore both the Do Not Call list and any request you might make.
Modern technology can also protect you, if YOU do a few simple things!
The first thing to do is buy a call blocker device, service or app.
Then, use it correctly.

Google "call blocker" for more information.
http://goo.gl/cdPm8O

If you cannot afford or use such a tool, then:
* Do not answer calls from unknown numbers ... let them go to voicemail or answering service
* Do NOT return calls from unknown numbers!  All that does is verify your phone number!  And, in some cases, those return calls may cost $20 or more to complete.
* If you have a "dumb" cell phone, assign the scammer's number to a group named "scammers" (or similar).  Then, assign a silent ringtone to that group.

they called my cell phone 15 times in a row........

I am constantly getting calls from "Rachel from Cardholders."   No matter how many times I ask to have my name removed from their automated calling service, they still call.  I actually spoke to a live person once who arrogantly said do you really think you can do anything to stop us from calling...we'll just switch to another number.  So now I get calls from different numbers and if I answer, it's always "Rachel from Cardholdlers."    Interesting she changed the message now to only one option which is Press 1 to get an Operator for low rates, etc.   When I pressed 1, I got a live person and I said I am calling about these automated calls that I am constantly receiving and he cut me off and hung up.  In the past, there used to be another option to press to remove your name from the list (even though it didn't work), but now there is no other option except 1 for the Operator.  The phone companies need to do their job and catch these harassing phone calls.

Stop calling.  Pieces of trash

SECOND PHONE CALL FROM DIFFRENT NUMBER FOR SAME SCAM.ONE HOUR AGO FROM 301-240-5445. ONE DOLLAR CHARITY DONATION FOR CHILDREN  CANCER FUND. CHARGE IT ON YOU CREDIT CARD AND GIVE THEM INFO SO THEY CAN ROB YOU WITH ALL AVAILABLE CREDIT. I DID ASK HER WHAT SHE WILL CHARGE ME TO HAVE SEX WITH HER AND I WILL GIVE SAME AMOUNT IN CHARITY SHE IS ASKING FOR. HUNG UP. THIS IS NEW SCAM TO GET YOUR CREDIT CARD NUMBER AND IDENTITY.