[Resolved]  Reliance Data Card — Cheating in offer on reactivation

I have beeb using reliance data card for three years. However, since the data card got damage, I kept the same in safe custody for three months. Then, I reactivated my service based on the offer given by the retention department for Rs. 450 per month for 1 gb download.
However, when I received a bill in first month, I was charged with Rs. 650 as rental. I think I have been completely cheated by the company. The data card was purchase from the webworld on their confirmation that the service has been alloted you @Rs. 450/- p.m. as recorded in their system
When I placed a complaint (no:[protected], I was told that you were incorrectly communicated the offer and nobody is authorised to give such an offer.