Means you got reply like wait for now?just got generic reply. thank u for contacting blah blah blah.
guess we just wait now.
For me, yesterday I called cic and she told me like we haven't sent a letter that is why you didn't get. Letter printout is ready and address is confirmed just wait for sending. So, I asked approximately time but she said I wish I could say that
So from above reply, it seems like local office will send letter as a hard copy by courier.