How exactly do you email NILC? And what exactly should I put in my email?

I already spoke with a representative who submitted a request to have my case looked at and receive a response since I submitted my application since February 29 did my biometrics and still haven't recieved a response. But I would like to email NILC as well to see what else can be done since I'm almost reaching 6 mths since I submitted my renewal.