keep getting calls from this number always hang up

Another breast cancer call. Looking for money and would not take no for an answer. And cancer society wonders why they have such a bad reputation

Received a call at around 6pm. Didn't know number. Didn't answer. No voice mail left. Blocked number

I receive calls from this number ad nauseam....answered today and there were two people laughing in the background.  I said "Hello?" kind of b*tchy and the guy came on and said "Oh, you gonna to be like that?  We will call you later" and hung up.  I called back to hear a recording saying they are a charity, collecting for "well deserving" groups and they will return my call.  They followed that message up with a statement about them being a charity and therefore the DO NOT CALL Registry doesn't apply to them

Didn't answer  and I am glad after reading Ruth's and Julie's postings. Blocked now