i got mostly 7s but my 4 in maths is holding me back

i got mostly 7s and 6s in my GCSEs but my 4 in maths means i cant do science a-levels. but im so determined to do it. so what do i do, because i dont wanna change my a-levels. i was only 12 marks away from a 5 anyways. i live in ilford, does anyone know any colleges that will accept me?