Reliance Communications — charging more than what was promised

Address:

Andhra Pradesh

[protected],
Dear sir/madam,
I have recharged my phone reliance prepaid number [protected] with rupees 550/- about one and half year ago due to which I expect to have all local calls @50 paise as was indicated by the service. Until recently I was charged so but all of a sudden I am being charged one rupee per call.
Now, when I called the customer care for enquiry at 198, the person spoke that there was no such offer anytime or it should have been recharged for one year term only. I have not got recharged with any other jaadu pack any time.
Once, 3-5 days back one another customer care person told that I was being charged 99 paise per call. The next day when I called again, I was told that I was being charged 50 paise per call.
Not only this, several compliants about the customer service people who attended my enquiry, request, or calls for compliant; about the rage with which they speak, about the information they give ....
What should I do? Shall I simply cancel my number and go for any other service? Can I be helped in this matter? If yes, how? Please suggest.