I've been able to block "Purple Heart" until they started using this number. What I have since learned. A number can appear on your phone that's not the true number they are using. A computer generated number disguised as the number above. I'm totally done with this crap..
I have received 6 calls in the past few weeks despite having blocked the number. The people working for Purple Heart must not have much work to keep them busy. I made it a policy to not donate to any charity that does not respect my request to not be called. If everyone would stop donating to this "charity" the public might get a little more rest at home.