you should be moved at the cabinet. this border line stuff means nothing to me. if you can be moved at the cab you should be. mine was 51 and asked to be moved at the cab which made a huge difference. my connection was then a lot more stable after sitting at 45max.
have you got an attenuator fitted? splitter?
---------- Post added at 21:56 ---------- Previous post was at 21:48 ----------
your currently on r30 firmware. the new r36 should be with you this week, i cant remember which day? try a reboot now, power down for a minute then power up the SuperHub. the new firmware stabilizes the SuperHub alot, its able to handle the connection a lot better than when its running r30. that said your upstream still needs lowering. call out a senior tech and ask to be moved at the cabinet. if you have no joy email the CEOs office...