Use CHIRP.
CHIRP
Fire it off to them and they will put it through to the right person at the CAA.
You can get some cracking FISO's and some crap ones just the same as pilots.
Don't take it to heart.
The CAA have in the past taken a rather dim view of FISO's who over step there remit.
And public telling offs on the RT are not the done thing be you AG/FISO/ATCO/PPL/CPL or ATPL.