A lot of charities in the Netherlands do the same thing, where you can't just give a one-time donation, but have to subscribe to a monthly contribution.
That is horrible enough as it is.
But then to unsubscribe, you have to call them (during their and your office hours) and endure another couple of pitches to keep you subscribed until you are finally allowed to cancel.
And then some of them even have a cancellation term of one month.
This is the reason i have a label next to my doorbell that says: "Donations only without subscription and to volunteers". Since then we've not have a lot of charities ring the bell, and the ones that do I actually want to give to.
In my case it was trivial to unsubscribe, but they then started sending me all kinds of letters in regular intervals. And never stopped, I still get them years later. I'm certain by now they paid more for those stupid letters and pens than I donated in the first place. Which is yet another reason for me to never waste money there again, as I now know where it's used.
That is horrible enough as it is.
But then to unsubscribe, you have to call them (during their and your office hours) and endure another couple of pitches to keep you subscribed until you are finally allowed to cancel.
And then some of them even have a cancellation term of one month.