Kenstar — ac not cooling, customer care not getting connected

Address:	Bulandshahr, Uttar Pradesh, 600097
Website:	www.kenstar.in

It's 10 months i bought Kenstar AC. now days it's not cooling properly, almost, i complaint customer care, and waiting for engineer to visit.
after a week I tried to reach customer about details of my complaint, but unfortunately their line is always busy and not able to connect since a week.

not sure how customer care service would be busy always and even after waiting for 30 mins also never gets connected to executive, it's horrible service