The response I received also contained “The information you provided was forwarded to the responsible office.” I guess it is typed by an agent but its kind of an acknowledgement email. Doesn’t help your cause. Now I am not sure about how much time the responsible office would take to get back to you. I f I were you , I would send the passports to them in a overnight mail and also send a similar return envelope.
When does your 30 day deadline to send your passport end? And when is your scheduled travel?