Guild Wars 2

It’s really annoying. As a guild master i need to know WHO and WHEN actavated guild mission preference and Abandoned Guild missions. It must be in a Guild History but it’s not there.

For example, we have Mission Control in a G\Ranks. It’s allow users to activete missions, abandon missions and changing preference.
We have information about who and when activated mission.
But if i need to allow people actaving guild missions, but i do not need to allow them changing preference, what should i do now?
I need to know changing my preference, and when and kick this traitor from everywhere.
It must be two difference options, and it must be in a logs.
Also it’s must be information about, who clicked abandon mission. Who and When. With names and others. I am asking support already one months, they said, it’s personal information, but it’s not personal information, if it’s harm to guild.

2 options:
Mission control: Activate
Mission control: Changing Preference
And information into G\History
Who used changing Preference
and Who clicked abandon mission.

I do not know, where should i text ping me where =\\