Try and make friends with your parents again. I live on the streets right now and it's not fun.
Take a gap year, and get a placement in a company like GSK (if they do one). That'll allow you to save up £8k prior to the start of University and will rocket your employment chances with the company. If you perform well, they may even allow you to take summer internships with them - that's around £1500 saved for 10 weeks worth of work after expenditures. Assuming you do a 4 year course, £8k/4 = £2k per year. This means your budget for the year is £5500 for the first year, and potentially £7k for the following three - provided you do summer internships/summer work.
Universities also want students to help out on campus, so working at the union shop/bar/being a tour guide gives you at least £7/hour. If you do 8 hours per week, that's £56 <- Living costs minus rent sorted right there.
Thousands of students like you
They get a job
I really don't have any constructive advice, just wanted to offer my sympathies for your situation.
After GCSEs I was kicked out to support myself & as a result didn't do A levels. I am now a 33 year old single mother working to put myself through an access course to try & get in to uni.
As much as your family's culture isn't accepting of certain questions being asked I would try again. Point out that if they make it impossible for you study effectively you could end up liable for the repayment of student loans for a university course that you cannot complete. Will they really want to see you in a dead-end job with no prospects?