The problem with your email if it could be construed as a problem is you mentioned Humax as a possible cause. That provided Freesat with a 'get out of jail free' card i.e. blame it on Humax.
Mind you even if Humax hadn't been mentioned I doubt Freesat would have had much to say other than their perfunctory reply. If they had replied otherwise it might have involved them having to do something.