For what my opinion is worth

Trust your initial instinct of blocking all calls and creating a clean break.

Noting is worse than the drama of a on again off again relationship based on inferred intentions.
We can never know with certainty what another person is thinking or why they are doing what they want to do. However one would hope that a authentic relationship those involved would not have to to infer intention but could be honest with each other.

That you are playing the inferring intention game could be a sign that the relationship is not authentic and that it is time to move on and seek out better. You deserve better.

Through personal experience and observation I know how strong the pull is leave the door open just a little after a break up. There are psychological reasons behind this need and overly simplified perhaps I might call it the ‘Just in case’ affect.

Keep the door open: Just in case something better doesn’t come along, Just in case I start feeling lonely
Just in case my ego needs the boost of knowing someone is waiting for me – control, just in case….

Just in case isn’t good enough. Don’t accept Just in case from yourself or from others.