Wow, your sense of entitlement for your son is amazing. So your little Oliver managed a spot in the 10 or 11A's but was dropped later in primary, or once the new influx arrived in Yr 7? Who all MUST be on scholarships because, you know, an fee-paying kid couldn't possibly be good enough to displace little Ollie. And his grades aren't going too well either, and that's all the school's fault too, right?
Jesus. Maybe, just maybe, little Oliver actually needs to work his butt off to improve his skills in both the sporting arena and the classroom. You've sent him to a particular school for its rugby program, so while he's there how about he makes the most of it. Most schools I've come across have extra strength training sessions in the gym before or after school, plus skills sessions at least once a week for boys who are keen.
On the academic side I bet they have subject-specific tutoring sessions before or after school or at lunch, so instead of moaning about how the school has let you down, how about your boy takes advantage of what's a available and work his arse off to regain the spot that these kids who dared to arrive in Yr 6 or 7 "took" from him? And last time I checked, effort and application was the key determining factor in academic success. If he works hard, the geography isn't that important.