Blocking

I used to be friends with a girl who I’ll call “D”. So basically I don’t want to be friends with her anymore. I blocked her number, but she still could text me afterwards. Then I deleted her contact off my phone completely but “D” can still text me, how do I make it stop?

She also used to add me to group chats, and in the info section where it said who was in them, my number wasn’t there but I could still text but couldn’t leave...she did the same to other girls so I’m unsure of what to do. Did she hack or something? I have no idea.

Please someone help me I want her out of my life so she can’t contact me anymore.