My Vodafone GPRS was unlimited on my connection with out informing me they have change it to 1GB and charging me un-necessarily 1 paisa/10KB nd the total charges is 10,500,please help me on this . They are calling me and harassing me.

This is a Torture from Vodafone. Kindly resolve the issue without any more problems to me as Customers must be treated as King in the Land of Gandhi.