No, they're not over. It depends on the subject of course but for most things you've still got plenty of avenues to get to an RG university. Briefly, these are:
1. Resit a few AS modules of Politics and Psychology (I see that you said you were dropping English Lit two weeks ago - I'm assuming this is still true) and work very hard to do well at A2. It is very possible to get A*s in the subjects you got Bs in at A-level because you need 80 percent overall but the 90 percent requirement only applies across the A2 modules so if you were studying a science subject (sorry, I don't know the UMS marks for others), and got a low B of 210/300 at AS, you could theoretically get 270/300 or more at A2, which would both give you 480/600 (80 percent) overall and 90 percent at A2, giving you an A*.
2. If the first option doesn't work, you could do post-A2 resits although the scope of these is limited depending on the subject you're applying for (medical and dental schools don't like resits but I'm presuming you're not going for those given your subjects) and the fact that next year is the final year of the old specification in many subjects. I'm not sure whether there will be legacy papers in 2017 for those subjects for which 2016 is the final year because, while that has happened with specification changes in the past, those changes haven't been accompanied by significant A-level reforms like they are this time around.
3. If you didn't make the grades you need at A2 and don't want to do post-A2 resits, have a look at Clearing vacancies advertised from results day onward. An increasing number of courses at RG universities have been advertised there in recent years, especially this year since some government cap on student numbers was apparently lifted and universities, trying to boost numbers and hence revenues, eagerly gave out low offers for what would normally be thought of as competitive subjects (
cough Law
cough).
4. Take a couple gap years and then do an accredited Access to Higher Education course (all the while checking that the universities you're applying to are still okay with them) and get lots of Level 3 credits at Distinction. This should put you in a strong position when applying to RG universities that accept them (even Cambridge accepts Access courses at its mature colleges).
Good luck and do well.