Contact with ex

[Secondsight]

I have been with my DP for 18 months we don't live with each other. He has been split up from his ex wife for 3 yrs.
The relationship was abusive he wasn't allowed Facebook she would check his emails etc. She would ring him to check he was at work the list is endless.
She used to text and phone him all the time but after we'd been seeing each other for a year I said I'd had enough and he blocked her number. She bought him out of the house they have a grown up child but as they don't get on and she's abusive I don't see why there should be any contact.
Anyway she's started texting him again and phoning and it's usually for some excuse or another such as we need to get divorced etc. Sometimes it's 140 texts filled with abuse. So he has unblocked her.
I have no doubt about how he feels about me but I've made it very clear that I cannot tolerate this in the past do I have to say again?
I'm feeling v tearful, menopausal and I'm away at the moment on holiday wanting to have a good time but this is playing on my mind. We usually talk over messenger at night how do I say or write something which makes him realise and doesn't end up turning into an argument.

Op if he blocked her why did he reengage with her again?
What does he say about it?
Does he not see or have contact with his child?

I agree it doesn’t sound good

The daughter is 24 and lives with him. He mentioned one night how he was going to unblock her I think he thought once she'd bought him out her behaviour would settle down. I didn't say anything at the time I don't know why.
When I'd said I'd had enough of her texting etc he asked if I was jealous err no but I don't think her behaviour is normal.

Is he doing anything about the divorce?

I don't understand why he's unblocked her, in the circumstances.

No I don't understand either. No he isn't doing anything at the moment about getting divorced as he is legally separated as am I. She usually contacts him about a range of things then changes it. She wanted to sell the house then not, buy him out then not, get him to leave his half of the house to her daughter then not, she has been very difficult and bizarre at times.