Accessing older chat logs?

[_Masterviolin]

I was hoping to access chat logs of some crucial conversations from the evening (US Central time) of March the 17th, 2016, as the chat logs of some words I spoke in British Chat in the server are fairly essential to assists clearing my name for a security-related slip. I've noticed that the local game files show chatlogs back to yesterday, but no further. Is there some way to access logs from a bit further in the past?

 

Thanks!

 

[Ink]

There are two types of chat logs:

\SteamApps\common\Naval Action\Client_Data, the file chatLog.txt

and

\SteamApps\common\Naval Action\logs, files like chat_20160320xxxxxx

[_Masterviolin]

Aye; im looking at the "logs" folder, which lists the chat_[numbershere]. I see their content only goes back a day.