The best and most humane trainer for your pup in Mumbai is YOU. You can train your own dog. I train all my dogs and it is very easy. Please google clicker training and see if that will work for you. It is the most scientific way of training dogs. Clicker/marker training. When you train your own pup using humane, positive methods he will form a very strong bond with you and will obey you under any distraction.
You can see all my dogs at www.youtube.com/user/rrnsss