ACCA Advanced Performance Management

I am very disappointed with my P5 exam result as I thought I did well in June exam. I passed all my ACCA exams first time and I always practice previous exam papers and read technical articles and the examiner reports. I don’t know what went wrong this time and I keep hearing students setting this paper four, five times. This is my last paper to be fully qualified and I need advise what should I do differently to pass September exam? also, does it help to sign up for revision course with Kaplan or BPP?

Thanks