Most Helpful Girl
U need to cut off contact. She is just tagging u along. Next time she tries to contact don't respond. She will know u r no play toy of hers.
Most Helpful Guy
In your situation, if you're coming from a place of never wanting her back then I'd say cut if off. Feel free to tell her or not. Doesn't matter. Just go with, "that's just not us anymore and we both know why" then say goodbye or something to that affect. Delete her on whatever social she has you on. No need to block her unless she's really pressing it.
If you love her and part of you want her in your life still, then keep her as a friend on facebook and hide her page/posts from you ever seeing her unless you decide you want to. Don't text her and make her relatively invisible. You don't want to chase her in any way shape or form. She left you. Her saying you treated her bad really doesn't matter. Girls will color their memories based on their emotions towards you at the time or in the moment. You could tease her and if she has positive feelings towards you she will laugh and take it as you meant it. If she has negative feelings towards you she will take it as being mean or a subtle jab at her. So honestly, don't get caught up in that. It doesn't matter.
What matters is that you're pissed at her right now and you still love her and don't want to block her (what I assume). So, just put her on ice for now. She doesn't decide when you two talk or when it's okay for you two to be friends again if that's even something you want. That's your decision to make. She's already open to it, at least on the surface. You need to make that decision for yourself when you're ready to do so.