Living with grandparents at 17

So after my step dad threw me out just so it can be him, my sister and my mum I’m now at my grandparents it’s so old fashioned here and hard to coupe there’s no WiFi no service and I can’t apply for jobs here I’m struggling so much
I can’t even have a bath or shower everyday because they want to not use any water.
My boyfriend can’t stay over because they think we’ll have sex of which they do not believe in! It’s ridiculous Its like living in the 60’s but I have nowhere else to go

How old are you and where are you at with your education?

You can talk to shelter or CAB about how to get on the benefits system and maybe your own room?

https://www.citizensadvice.org.uk/about-us/contact-us/

https://england.shelter.org.uk/get_help

If you are 18+ then the council is not obliged to help you.