I technically failed my A-levels twice. Did really bad for AS, so my college made me retake almost every one of my AS exams and I did it alongside my A2 exams. Did poorly, and I just ended up at some University's pre-university foundation programme. Did really well, and got offers from Sheffield, KCL, Warwick, City and some *****y insurance University. You could always try looking for a foundation programme. I struggled with A-levels because the content was too broad, and you had to be very specific with your answers.