How do I (31 F) get rid of this woman (60 F) from my life (aunt)?

Please I can’t post anuwhere else. I (31 F), live alone. Don’t have contact with family except my parents and siblings. Aunts, uncles, cousins all know the score. Nobody tries to contact me because they know I won’t bother. Reasons are too long to get into but I live a different life to extended family and never see them, nor do I want to. I cannot make that clear enough.

Every birthday, one aunt (60 F) messages happy birthday and I do not reply. I have made it clear I want nothing to do with her before anyone asks if I have told her. She doesn’t care. She will use my birthday as the opportunity to cause drama when I don’t reply. She phones up my parents, gets them to tell me I need to explain AGAIN, says she’s “hurt.” I know she’s lying, she’s just trying to get back in my life. She’s that person who can’t accept you’re different, been like this my whole life. Loud, drinks a lot, interferes in your relationships, embarrassed me in front of previous partners. I tell her nothing and told my parents not to. I stay away from her in every way and even live 3 hours away. I never see her.

I have blocked her in EVERY way on every platform. She uses her boyfriend’s phone to text me. I blocked that number. A year later she used her son’s phone to text me.

I simply refused to text thank you and my parents said why don’t you just say thank you once a year, and it’ll sort the problem out? I’m now not talking to my parents. No one understands, I don’t WANT TO. Nobody else hounds me this much, why should the rule be different for her. And I know she won’t leave it at that, she will use it to get in my life again. What do I do?

TL; DR Aunt (60 F) won’t leave me (31 F) alone and uses other people’s phones to wish me happy birthday every year, even though I blocked her on everything. Parents said I should say thank you, but I want zero contact.