Sargam Electronics - Faulty Diakin A C sold bill No. SMT

I had bought Daikin A/C - Model - SACFTF**RRV***** from Sargam Electronics, Model Town II, Delhi - ****** having Bill No. SMT-***** on *-JUN-****. Along with the A/C, I had also bought an AMC for * years valid till *-JUN-****. This air conditioner is of very poor quality.
It had leakage issues in the cooling coil due to which all gas had leaked. After a complaint made on **-MAR-**** and multiple follow-ups, the leakage was fixed by soldering the coil under AMC. It was promised that if leakage occurs again the coil would be replaced. The same issue occurred this year and a complaint was made on **-MAR-****. Again the leakage was fixed by soldering the coil under AMC instead of fulfilling the promise of replacing the coil.
Looking at the track record with the quality of the product the problem would again occur next year or even sooner and after *-Jun-**** I wouldn't have an AMC to rely upon. After that, I would have to get the item soldered again every year and get the gas refilled which is a lot of expenditure which I would have to incur on a yearly basis because the company sold me a faulty, poor quality and sub-standard product.
I want either the company to replace the faulty product or take the ownership of fixing the coil and refilling the gas on its expenditure whenever the leakage occurs until the compressor is under warranty (** years).