LG Electronics — unsatisfactory service of a refrigerator (lg)

Address:

New Delhi, Delhi, 110009

I had bought an lg twin-door refrigerator from empire electronics showroom on 8th nov 2016 vide invoice no. Ee/150/16-17, but i regret to say that it is not giving satisfactory service. Its cooling system is not as effective as it should be and it vibrates. After we registered a complaint in lg call centre, the mechanic came and charged for 3000 and filled the gas. But the issue is still persisting. My refrigerator is still not working. I called him up many times but he did not pick up my calls. I told the customer care team and they said we only provide the number of the person but cannot not take any action against him. From the past 1 month i have tried all the numbers but am not getting a satisfactory response.
I am questioning again, please confirm if all your lg products gets damaged within a year or you sell damaged products?. It is really bad that a reputed company like yours sell such bad quality defective products.
Please try to help me out. I haven't spend so much of money to get a service like yours.