I have interacted with any of the Tata sky, services are worst( or even lower than that if possible). I can share my experience.
Recently I changed residence. I placed the request for relocation of my Tatasky dish. The technician came, worst person was not been able to open a nut. Then I helped him to get the nut cut. Then he installed dish after making lot of tantrums( basically I had all the thing intact like dish, set top box cable etc, so no kamai for him in the name of material). And not a single channel is working. I am calling customer care from 3 days, every time they assure that they are sending technician but no one is coming