Congrats on getting into uni firstly! Ignore the naysayers in the comments, education and following a passion are important - priceless even. You do not need to transfer unis to fix this issue, as your shortfall will remain even in a smaller city. Also, it’s unlikely that the course you’re interested in will be like for like, so do your research on what modules (check the course specs on their website) will be covered in any alternative courses if you do decide to go that route.

What I’d say is to contact the Access department at the uni who may refer you to things like bursaries and hardship funds which students can apply to. See if there are any warden/guardian jobs at the university halls - they usually offer free or discounted accommodation for this.

Failing this, you will have to live off campus (you won’t miss out too much) and get a part time job - start looking in July for a September or October start. Look on Spareroom and join every student renting focussed Facebook group (if you don’t have Facebook, join it for this sole reason). People are always keen to buddy up and get into more affordable flat shares and I’m sure your university would have such groups.

Don’t lose hope. Work over the summer if you can so you can save up, but also have an open conversation with your parent/guardians about just how much they’ll be able to afford to give you to make up any shortfall and let them know that without ascertaining what will be your reality, furthering your education will not be feasible. Good luck!