Difference in the Rate of Blank Sim Card

i have mail the customer care for the purchase of the new sim card against the old damage card. They had conversation with me for two days and they called me and given me assurance that it will cost you only 25 rs onyl.
When i visited the web world loacted at shivranjani ahmedabad, They ask me to pay 200 rs. When i show the print out of email he answered that call center executive dont know the rates.

Than I visited the other web world located at Paldi Bhatta.Over there they ask me to pay 150 rs. Than i vistied the relief road Web world they ask me to pay 180 rs.

I want to complain , when the company is same , the product is same then why the rates differs at company outlets and also in the system and actual web worlds.

i have mailed this issue to nodal officer . customer care, anil ambani even.

But no one is responding.

Gude me what to do.???