Apple India — My issue is highly neglected

Address: Apple care Bangalore

I have an apple watch which has a problem of batter draining to 40% without the use. I have submitted the watch thrice to the service centre and they personally used the watch and found that the problem was much more and they sent the watch to the Bangalore apple care for the repair but they always return the watch without repairing.
I also had a word with apple support but got zero service from them. I am very much into this matter as i feel i m getting servicely harassed for my own product. Being one of the renowned company i feel ashamed to say how they neglect the customer’s issue.
I want my issue to be resolved as soon as possible.