Housing: they simply CAN'T treat a tenant the way they are threatening to. There a a shit load of laws set up to protect you.
I also bet that they've put it in your name to hide something. This is probably why they are being so vicious about getting rid of you so fast and at any cost.
What this is will come to light, and you will be able to use it as further protection.
If they put the rent up illegally, the CAB/shelter can help you tell them so, which will buy time.
If they serve you illegal notice (a minimum of 2 months) again Shelter/CAB will help you here.
Let me explain something really clearly to you. Regardless of whether they ask you to vacate in a legally binding manner or not, you MUST NOT LEAVE. They will have to make you leave by court order, and even then by Bailiff in order for the council to help you (iirc, shelter will advise)
If you leave voluntarily, the council won't help you.
Another thing. No-one, but no-one has the right to enter YOUR home without your permission. If you feel that they will gain access and steal possessions from you home, you ARE within your rights to refuse all access, changing the locks (regardless of anything in any contract) you can/will reinstate the locks when you leave, or leave the old ones, with all keys for them.
Trust me, I had to do this and got legal advice from all over the shop, cab, internet, here, and shelter and had case law to back it up.
Your DD: the GP have no right to any access, and tbh after this stunt, neither should they.
No-one can/will take your DD away.
Given the threats you're getting, i'd get a restraining order and poss an occupation order to ban your ex from contact.
You asked how do you stop loving him? Simple, he'll show you how, just open your eyes and see what he's doing to your DD. He's disgusting.