Airtel — model maniaw service deactivation not possible?

My money was deducted even though i didn't want it to to due to the activation of model mania services and i don't want that again to happen so kindly please deactivate the service it is not getting deactivate it even though i tried. My monew is getting wasted and i want my money back i done use any of your services please return my money i don't use any of your services as you know last time might 70 rupees was but i don't know how i didn't even activate your services please deactivate all my services and it may not happen again please