If there has been a recent incident, in the last seven days, you will be able to apply for a non molestation order (NMO) on an urgent without notice basis. This means that you should get a hearing in the next day or two and the court will decide on whether to grant an interim order or whether to list the matter for a hearing so that the respondent can attend court to answer to the allegations about him/her.
If the court grants an interim order it will need to be served on the respondent before it is effective.
Non Molestation Order, form FL401: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/954473/fl401-eng.pdf
You might be able to get help with completing the application and the statement you have to write to accompany it, from NCDV.org.uk - they are a charity. There is no court fee to file the FL401.
You might be eligible for legal aid and should check here: www.gov.uk/check-legal-aid
If not eligible for legal aid, you can find a solicitor here: solicitors.lawsociety.org.uk
You have the right not to be abused. You can obtain support and guidance from the following organisations: