Level 7 Referee
This is not about the football bodies, it is about the refereeing body. If they let the chap to get away with it when there is photographic evidence taken at the location (and witnesses they can call on from the home team), they are just as bad as the footballing bodies full of words but no action when comes to dealing referee abuse.@Phonesurgeon
It's really important to know who your 'team officials' are prior to KO
This ref sounds like he's merely an 'outside agent', in which case it's just noise (only prejudicial comments must get our attn. and be reported etc.)
The other thing, in my experience, is that unless you follow the dismissal procedure correctly, it's likely the chap will get off with any offence, if he claims mis-identity etc.
I honestly find this very hard to believe that someone who has been a referee for say at least 4-5 years and had to start out as a L7 referee at one point and learn the ropes could act this way.