BSNL — change of my plan without inform me

Address:

Haridwar, Uttarakhand

dear sir
i am custmer of BSNL prepaid mobile service with mobile number [protected]. i was using the prepaid mobile plane all @ 49.
on date 27/05/2011 i renewed this plan again upto 26/05/2012. the charges of rs 44.42 deducted from my acount. after that my call rate become 49 paise per minut but last month i recharge my mobile with STV of rs 17, due to which my call rate at BSNL mobile during night become 5 paise per minut for one month and during day my call rate increase from 49 paise to 60 paise when i try to compaint it in call center they called me that your plan is change from [protected]@49 to 2G special and you can change it back into [protected]@49 by recharge of Rs 3. and i call him to registered the complaint that my plan is change without inform me but they refuse me to registered the compaints