You would have to check with the school/college that you will be doing your A Levels.I am sure you would have to put forward a very, very good case. What grade do you think you will get/ got anyway?
From experience some students that get As (and even A*) at GCSE struggle with the A Level. Getting tutors is not the absolute answer, they are not magicians. Think seriously, do you really want to put so much stress on yourself when you could study another academic subject that you are good at and that would be respected by a University or Employer?
Best of luck with your results !!