Donation to World Wildlife Fund

I have had a stoporder to donate to this fund for many, many years now. While reviewing my bank matters, I realized I have not heard back from them in a while, but when I reached out, I was told that I am not even on their mail-list!! I sent another email asking if they don't keep any records of donations. This was in July, but to date, I have not received any reply from them. I'm now in two minds whether I must go and cancel my stoporder or not ....