My friend got AABD at AS and got in so I would say it's still do able. If you do well in the TSA (thinking skills assessment) or whatever test or work you have to submit and then have a good interview they become less grade orientated. My friend also got let in on A*AB even though the offer was AAA.
If you resit I'm sure you'll improve on them. Btw did you do AQA maths? I'm applying to Oxford and I'm going to resit core 2 to bump myself up
All the best
Tash