Government Department
Non Delivery, Misbehave

Please try to utilise below mentioned GoI sites to complain directly against your grievances.

GoI PORTAL FOR PUBLIC GRIEVANCES

http://www.pgportal.gov.in/Grievance.aspx

and, specifically complain regarding our 'sweet' post offices--

http://www.indiapost.gov.in/Ccc/PCData.aspx

PS: After registering your complain, keep checking the progress over their resolution on the same websites. Please don't take rest until you teach these careless and mindless people a lesson. Best of luck.