Event Photographers (Dubai)

I have a question regarding photographers: why does some photographer take pictures then doesn't publish those or send to email address ones requested?
I am talking about Tommy Lens. I even have contacted him by email, tried to call but been ignored!
is it normal behavior?
Almost 1 month past after the InterNations Dubai Birthday Bash @ Mint Leaf of London (DIFC) took place on 9.09.2015