You send a text and an email once again giving the person a deadline, indicating and reminding what day they moved out and stating that you returned their deposit to them for ordering movers. Save email and a screenshots of a text. Also locate all previous texts re deadlines for moving stuff out

Follow up with a certified letter repeating the same thing.

Couple of days before deadline send another reminder re deadline

Whatever they didn’t move out by the deadline, you could do whatever you see fit. Dispose. Sell. Put in storage.

That’s a routine procedure.

I know you wanted to be nice. Not involve authorities. Not be nasty etc But being nice with these people gets you no where. Stop being nice. I don’t know anyone allowing people who don’t live there showing up repeatedly for months picking up their stuff. It’s disrespectful to you. It’s rude. Degrading. He doesn’t live there. It’s your place now. If you not there, he shouldn’t come in. Probably snooping. Even if not, he shouldn’t be there. Now he is killing bugs in your place. He doesn’t live there. And if you are there, he shouldn’t be going in and out either. He should be only allowed to come with movers one time, maybe two. That’s it. No back and forth. His back is not your problem.

Stop discussing anything about blame and infidelity. Nothing to discuss anymore. It doesn’t matter what he accepts or not. These discussions only prolong drama. Inform him in writing of a procedure re moving stuff out and be done.

He knows you aren’t going to do anything about the deadline because you are nice and he’ll be showing up for another 5 months picking up stuff. Well, being nice should be over like yesterday