frequent, unsolicited, annoying phone calls

In the last year, I have blocked numerous numbers shown on caller ID as being from the American Heart Association. It is starting again, and I did read that February is American Heart Association Month, so they are ramping up the solicitations for donations. I have been receiving numerous calls from different numbers from the AHA in the last two weeks. I do not answer, and I do not give to any organization who calls me. I haven't given to this organization and will never give because of their persistent, annoying calls. There should be one contact that people can use to be removed from their list. Also, there are so many scams that using so many phone numbers raises a red flag in my book. Don't know if theses are really from AHA or not, but if so, they are not doing themselves any favors by annoying potential donors by using these telemarketing tactics.