I don't want to respond to phone calls, texts, etc. No matter how I respond, it isn't right. It is defensive, or argumentative, or not productive, or not acknowledging my poor behavior, or picking a fight, or ... . It doesn't matter how I respond.
No matter how you respond, she will not treat you right.
It doesn't matter how you respond. *Even* if you do not respond. If you do not respond, you are setting a limit on how she can mistreat you. You are telling her, because there is no way that she can intact with you that is respectful to you, and not just using you for her ends, then you are choosing not to interact with her.
And this might include, not listening to any messages she leaves, or not reading any letters, e-mails, or texts that she might leave. If you are concerned that there might be a legal matter, or some issue of logistics, that still needs to be taken care of, you can have a third party (such as a good friend) read it for you and tell you if anything needs your attention. Most if not all of it will not.
If I don't respond, I am ignoring her, giving up, don't care, going into my man cave, etc.
If you don't respond, then you are taking care of yourself. It is her prerogative to devalue you when you don't respond, just as she devalues you when you do. You just need to protect yourself, and insulate yourself from her disordered devaluating behaviors.