Sorry you’re going through this OP - it’s a nightmare.
Been there, done that, got the text message informing me I was divorced after 69 days (I kid you not). I was glad to see the back of the fool especially when I discovered he’s got form for this sort of thing.
I consulted an Imam at the mosque to see if a text message saying “Inti taleq” was sufficient under Islamic law to effect an Islamic divorce and he told me that a text was classed as written intent, so that was enough and I was indeed divorced: by text!
If you wanted to get married again you’d have to wait three months or so (3 menstrual cycles) to make sure you’re not pregnant.
If you didn’t marry in the register office your nikkah doesn’t give you any legal protection. If this is the case, under the laws of England and Wales you’re not legally married, so therefore you can’t get a divorce. A solicitor won’t be able to help you with financial settlements and so on.
Make sure you make him pay child support.
In short, you don’t have to be present for him to divorce you and there’s nothing you can do to stop him.
I would make sure you get a copy of an Islamic divorce certificate in case you decide to marry again. My ex did all he could to avoid signing such a document (I wanted more than a text) so he had a shock when the Imam turned up at his place of work with two witnesses and a certificate during a busy shift. 😊
Good luck to you!