Flipkart — payment done but product not yet delivered even after a month

I have ordered kaspersky 1 year mobile security on 18th december 2018 by flipkart pay later. While ordering it was mentioned that the product activation code will be sent to my registered mail id within 24hours. Today is 11th january 2019 till now i have not received the activation code and flipkart was sending me mails daily regarding my payment dues (Which i had to pay before 10th december) from the 31st december to january 9th (Which i paid on 9th). I contacted flipkart customer service about this issue but no use. Even today when i checked my orders it's showing delivery will be made by 21st december 2018. Very disappointed with the service.