Hi don't bother contacting VNA.
I suggest writing directly with your very valid observations to Skyteam at.
SkyTeam Airline Alliance Management
Schiphol Boulevard 367
Tower B, 8th Floor
1118 BJ Schiphol
The Netherlands
Also copy to:
[email protected]
iosa carry out the safety audits but will never audit a VNA 321 with 4 crew.
Good luck.