Reliance Communications — Not able to call after charging the cell

I have recharged my cell with Rs 799 to get the unlimited STD but I am not able to use that facility for even first day. My cell was disconnected in the middle and when I again tried calling "insufficient balance" is what the message I am getting and when I try to contact customer care they are saying our cell is only recharged with Rs 249 and also they did not talk properly. I don't know what services the reliance is providing but I will request you all not to purchase any reliance product as they are cheating with their customers. After recharging the cell you are not getting the proper services. Nikhil