Reliance Communications — plan tariff

Address:

Bangalore, Karnataka

hello sir, as i have purchased a reliance gsm sim with no [protected] in 2010 july 22. on purchasing date according my plan,call charges was 1 rupee for 3 minutes. but from past one week,i observed that my call is charged for rupee1.20ps for 3 minutes. and i spoke to reliance senior correspondence and they said that my call is charged rupee 1.20ps for 3 minutes since the sim purchased date. but this is clearly cheating.they have changed my tariff plan with out my permission or without any intimation. so please make justify to me. pls pls sir.