Panasonic — gas leakage from ac within 10 months

Address:

Kolkata, West Bengal, 700010

I brought a 1.5 ton panasonic split ac on 28/3/18 from great eastern vip road, baguiati, kolkata, westbengal india. My installation was free, still i was charged and very poor installation was done damaged my walls. To add to my woes within 6 months it spots cooling entirely, i lodged a complaint, a service person comes and says the refrigerant gas has leaked out, it needs to be refilled, the refill will be free as it was but charges me rupees 1500 for shifting the outdoor unit. Then within one week leak again occurs, there is smell of gas and the tubing is oily, the company's poor technicians cannot detect the leak