Used to work at QF in HR - inundated with people just dropping by without appointment (not QF people, just people wanting to hand you their Cv) and they would get offended if you said, sorry i have to go for a meeting, like you had all the time to sit and chat.

Also, used to get 300+ emails a day on top of all the unsolicited CV's we would get. so, think about that when you are moaning about no response.

And i used to have to do a tonne of unpaid overtime just to get through the work.