Surely they're going to help you when you have that name.

i'll tell you now you're gonna need to share more information, nobody will beable to help you just based on a vague 'it dont work'

Upload a copy of your RPT file - you can find this here: (typically)

C:\Users\ {yourname} \AppData\Local\Arma 3\

The file you're looking for will have a format like this:

arma3_2014-01-24_01-41-18.rpt

upload the latest one (the game generates a new one everytime it runs). that contains invaluable information for the developers.

as for customer service, i've never had an issue before with them, but do keep inmind they just did $1 mil in humble bundle sales, so im sure they are swamped.