I’m an O neg. Thanks for the reminder about uni donor vs. receiver.
I used to get bugged nearly daily by Red Cross solicitors. However, when I came in, their “diverse” staff ALWAYS treated me like cr-p, took hours of my time and a personal health condition (that they didn’t care about) made donating hard anyway. I had to beg for months, before I finally got put on the no-call list.
I don’t know who your blood donation service was, but the one I use, LifeSource (Northeastern Illinois) has always treated me with the greatest respect. I have been donating blood for the last eight years.
Tell them you vacation in Africa. They'll never call again.
Ditto, until I got hep A in 1984. They wouldn't touch me with a 10 foot poll, now. At least it stopped the phone calls.