If you like law but are not enjoying this year/univeristy, you could always either change university and finish this year then enter year 2 or see if you can re-do your first year at the new university, you may like a university away from home and stop getting homesick, where are you from?
You could always drop out, resit modules in your A Levels that you have already done and try and get your CDcc to something like BBbb between now and June then in the next academic year, do the A2's of the AS's you have and perhaps do some more AS's, or a full A Level in a year whilst reapplying to a different university. I've noticed Law firms asking for 300 UCAS points.
Theres always the option of a part time degree which although will take you longer you can do law related work enhancing your learning.