Unfortunately, the people who are calling you will not see your message unless they are monitoring this site, a highly doubtful scenario.  Therefore, your pleas will go unseen.  A suggestion would be to block the number.  The do not call list is just that, a list.  Telemarketers are "supposed" to register and purchase the list and consult it to make sure they are not calling a number on the list.  However, some will register and purchase the list knowing that the numbers on it are valid and are hoping that the people they call will either ignore them, or respond without reporting them.  I believe the laws differ from state to state so you may want to consult with the FTC or FCC but reporting them is a good bet as is buying a call blocker or adding a call blocking app to your phone if you do not already have one.