If you have DM and no news after 16th Sept, strongly suggest that you call them..
Others had this issue with DM on 30th September and when they finally called 3 or 4 weeks later, they realized that the email for the PPR was sent to the incorrect address... and he/she was lucky that it was corrected before the 30 day period.. or it could be a problem.. I remember reading more than 1 case of the exact same story, because the email address is entered manually at this last stage
I suggest you call CIC immediately today itself if possible, to ensure that PPR wasn't sent on an incorrect email ID..