Airtel — pack is not deactivated

A service is activated on my no. [protected] From last 7 years for call rates lowering on a particular no. For which rs. 1 is deducting from last 7 years . After contacting to the customer care they were not responding well. We also visited to the airtel service centre but they said we can't do anything and you should contact to the customer care for this . We are trying to resolve it from customer care from last 3 months. They are providing us some methods but after all trying, We are are not successful .