Samsung — Side by side refrigerator

Respected Sir/Madam
this is to bring to your kind notice that I purchased Samsung SIDE BY SIDE REFRIGERATOR with 10 year compressor warranty in 2016. It was one of the best and latest models available at that time, so worth investing a huge amount of 70, 000 rs.
after 3 years, it had a gas leakage issue, which was resolved by Samsung engineer. But now only after 6 years, it has stopped cooling all again. Open calling customer service, an engineer was appointed on 27th November 2021.
Following that day, my refrigerator is OFF with the problem not being resolved. I am bearing loss on a daily basis by throwing a lot of eatables, all the content of deep freezer since that day.
Though number of engineers visited, but no one could detect the exact issue and hence had no clear idea on how to proceed. Hot and trial method is going on since then with the flow of events as mentioned below
28th nov: 1st visit, fridge closed, gas refill advised
30th nov: 2nd visit, gas refill not required as there was no leakage. Rather nitrogen to be filled to check exact cause, probably rusting of body or some internal issue
2nd December: 3rd visit, but the engineer didnt have nitrogen to fill
5th december : 4th visit, nitrogen filled
6th december: 5th visit, nitrogen level was fine, no there was probably no internal issue
7th december: 6th visit: engineer comes to fill gas. Objected by me since gas fill has no use as there was no leakage detected at first place.
8th december: 7th visit: engineer now fills nitrogen again, now in the lower chamber saying earlier only upper chamber was filled
9th december:8th visit:engineer came to fill gas as the only resolve he had. welds the upper and lower chamber . but gas refilling could not be completed as he was hurt on hand.

this is the flow of events, whereby the exact cause of ineffective cooling is not detected and with no solution, the only way is the just fill gas.
Sir/Ma'am its really unprofessional from the company whereby the engineers just keep on giving different options with lack of communication and clear idea of problem resolution.Along with that its immense loss for the customer who after buying an expensive refrigerator, probable the best category of refrigerator fro a renowned international brand is throwing lot of eatables evey day . In 6 years of purchase this has happened which clearly indicates that the product is not having a long life and not a promising performance. I am not residing in an area with hihg concentration of sulphides which normally result in leakage. As a customer, I have full right to get exact resolution of any issue of product which is used as advised by the company. Filling gas this time means obviously its not the solution, but a way to just a temporary method with which the problem will reoccur again making me and my family face the same trouble all again.Now i need and demand a clear explanation on (A) What if the problem reoccurs again since the treatment is done without diagnosis of problem. (B) Am i supposed to just keep on spending my money ...first in an expensive refrigerator and then on its inefficiency (C) What is the expected life of the refrigerators made by the company (D) How can the consumer contribute towards longevity of the product.

Hope you go through the entire issue, understand the torture faced by consumed and act on it appropriately.
regards