Unfortunately, without the additional information requested in my first/previous response, I will not be able to give you detailed advice to your question, but I will be able to give you a general answer, which I hope will be of assistance. If you are able to supply the additional information later, please do so and I will then come back to you with a more detailed answer.
If you are in need of help for you and the children, then depending on what help you need would decide where you would need to.
If the issue is housing, then the local council would be where you need to go to seek help.
if, the help you need for you and the children is to stop any form of domestic abuse, violence, controlling coercive behaviour from a partner or ex partner then you can apply to the court for a non molestation order. That can be applied for online. https://www.gov.uk/injunction-domestic-violence
Ypu may well be able to gain legal aid for this so that a family law solicitor can help you. The link here will help you find a local family law solicitor and to apply for legal aid. https://find-legal-advice.justice.gov.uk
You can also seek help and assistance if required from social services.
I hope this gives you some guidance a s to where you can go to seek help for you and the children.
Thank you for using Just Answer and for allowing me to assist you with your legal enquiry. I am pleased I was able to be of assistance. Please do not hesitate to come back to me for further advice on this or any other legal matter. It will be my pleasure to be able to assist you again.