Tata Sky — Add channel without my consent

Address:

Bangalore, Karnataka, 560085

I am a subscriber (Subscriber id-[protected]) of tata sky since 2013, i activated star sports channel for only one month and it was clearly instructed. I called customer care to deactivate add on pack. The customer reply was "if no amount or balance available it will be default deactivated". On one day i have got a massage that your balance amount is 12 rs. My concern is how could it possible? How could you activate a service without my consent? If you do not respect your customer then how could we trust you? No to drop this pack, i have to recharge 12 rs then they will remove it seems complete bull service. Just imagine how they harass customers.
I want clarification.
All customer of tata sky please don’t believe them. They are cheater and uneducated.