I have been using Tata sky for last five years of more. No issues of customer services. They activate the service in couple of minutes after new installation.
Dish TV is horrible. I recently took dish tv connection 4-5 months back. After installation it took 36 hours to activate the connection.
Till now unable to register at dishtv website. Says your VC number is not registered(025 3500 9461). Customer service is too busy to attend. since last 15 days. It will die its own death.