Samsung — Regarding replacement of samsung galaxy f23 mobile

Hon'ble sir /ma'am
I have bought a brand new Samsung galaxy F23 mobile from Flipkart. After using it for a few days it started showing network issues and it stopped showing sim cards, so that I went to samsung care bhiwani.they checked the mobile and asked for ₹12000 for a software update. after that I complained to my insurance agent and they picked up the mobile and returned it after repairing.but the issue is that I have facing the problem again and again. Every time The insurance agent pick up the mobile and repair but doesn't tell me about the problem and repairing Process. As I am facing the same issue so many times .I want that my mobile should be replaced as it is in warranty period and have a insurance also. Kindly pay attention towards the same.
Thank you