SANBS unfriendly stuff

Today I went to Jabulani mall to donate blood, had a disagreement with a guy named gift and I was rude to him because he didn't want me to donate, then I was threatened by one of the ladies working with him that they'd remove me from their data base and wouldn't be allowed to donate again, was told my blood was not needed... I was giving a gift of life to someone in need and today I actually found out that it was not needed, I don't get paid to donate blood so I don't have to do it again, I was doing it out of the goodness of my heart but clearly the stuff at SANBS don't see that... I'm so disappointed and I'll never give up my blood again