Tbh you are wasting your time, OCR will never change anything just because a few people complain, I am sure they get complaints every year.
I can understand how a copy and paste of the exact question gives a student that did the past paper and saw the mark scheme an advantage, but then again revising anything for the exam that comes up gives you an advantage, at the end of the day the repetition of the question does not give an UNFAIR advantage to ANYONE, the paper was online for ANYONE to access, and if your teachers did not give you the paper like other schools do, then you should blame your teachers and the way the Biology dept in your college gives out students resources, and not deflect the blame onto the exam board. Rules are rules, and OCR did not break any rules whatsoever in the repetition of the question. And yes, it has happened before, I had a question in my Physics Unit 5 exam where the question was laid out exactly in the same format, with the calculations requiring different numbers but there was one 4 marker in that question that was worded the exact same, with the exact same mark scheme.
Plus, it technically wont be the exact same question unless the mark scheme is EXACTLY the same, which of course, you don't know is true yet.