3 calls in last two days.  Always hangs up when I answer.

Called last night asking for money for Children's Cancer when told I was retired, on a fixed income and couldn't give them any money they apologized and hung up. They called again today, when I answered they hung up. I returned the call to ask them to take me off their list and just got an automated response that "your call is important to us, please stay on the line and we will be with you shortly". I stayed on the line and shortly they hung up.