Airtel — forcefull charges on international roaming

Address:

Bangalore, Karnataka, 560064

Airtel activated international plan, without consent and now wants me to pay for it.
I made an international trip to europe and asked for an activation of plan. I specifically mentioned i dnt need any other packs (For other countries).
Instead of this, they charged me for in-transit countries and now refusing to accept their fault.

Its extreme high handedness, by the company and they want its subscribers to budge and pay money for services which hasn't been asked by them. Unacceptable.
Have already written to consumer court