Called and left a long period of silence on answering machine then hung up leaving no message.

left no message.

Called didn't leave message

Scumbag hiding under the guise of a "fundraiser", which really means that they keep the majority of the money for themselves and give a tiny fraction to the charity they pretend to represent.   Don't waste your money.   Give directly to any charity your care about and end these calls by NEVER giving to someone who calls you under a hidden company.