I've had to block this number as they are now calling non-stop. It's been daily, sometimes more, and like other commenters, it makes me want to cancel my monthly donation.
I called back and it’s an automated message from doctors without Borders saying that this is not an urgent call and that they will call again. I did not hear all of the details the automated message gave because it was too fast, but I’m pretty sure it has something to do with either raising funds or satisfaction survey.