Samsung — Samsung M51 turned out to be defective in just 2 months o[censored]sage

I purchased newly launched Samsung M51. It was delivered on 16th Oct 2020 and within 2 months o[censored]sage, touch has become slow in responding and screen has started flickering with variations of color. I had approached service center and I was told that its liquid damage and repair would take 16K. Phone was never disposed of to any liquid. We had a party on Christmas, it seems that the screen has stopped working in fog. Its surprising to know that this cheap phone can't survive winters. Product is pathetically manufactured and it can't stand winter fog. I have been using iPhone and HTC on my other numbers and I have never experienced such issue in winters. I am highly disappointed and can't afford to pay 16k in repair for 22K phone. I am stunned with the bad manufacturing of the product and surprised to view such damaged manufacturing.

I was promised a callback from NITIN(from CO office) but noone called.

Please help!