He has his agency listed on his website.
Is there any particular reason you keep writing to random addresses instead of to the one he provides?
ETA: I'll never understand why people ask & trust the anonymous owner/operator of a message board over the celebrity's own website, which provides both their up to date agency information & the celebrity's primary email address, so you can ask them directly for the best address.
Why would someone known only as "
admin" know a better way to contact Mark Dodson than Mark Dodson?
Out of curiosity, did you even Google "Gregson Studios" before writing to them? The only affiliation I can find is by Googling both together & all that comes up is this website & that they both worked on the same project at one point. Looks to me like you chose to throw your money away on this one.