Airtel — opted for unlimited call pack but balance gets deducted when service number calls are made

Address:

Bangalore, Karnataka, 560047

I opted for a unlimited call and daily data pack for 365 days. Now whenever i make a call to a service number my balance gets deducted. Why do you say it's unlimited then?? It's not mentioned anywhere explicitly. I even called the customer care and he says it's mentioned in terms and conditions that some numbers are excluded!!! What terms and conditions and where? While recharging there are no terms and conditions mentioned anywhere, just details of the pack having daily data and unlimited calls.
This is cheating customers upfront.. You make them pay a hefty price and then again deduct money again. I have attached the screen shot where the offer details are mentioned and when clicking payment it directly takes to payment gateway. Where is the terms and conditions mentioning 'some service numbers are excluded? ' and what's the definition of some???