Consumer Redressal

My name is nitin chauhan I am using a reliance cdma 9311121121 and my billing cycle is 18th of month, credit limit is 1000 on the last 29th of November my service become barred due to over unbilled amount of Rs.5213 on 29th of November i received a message from reliance that your service is barred due to 5213 of unbilled amount, While my credit limit is just 1000 then how is this possible. . I want to now why didnt company alert me before crossing the credit limit, and pls explain the meaning of credit limit. I dont know what to do now....... Please help and save the citizen form those fraud companies. And take strict action against Reliance communitcation for this 2nd time cheat with me.because I have already launch a complaint in consumer court for "connection is not became activated due to fake commitment of reliance employees" in this complaint they provided me 9311121314 but after a big issue they said reliance communication is not able give you the same no. of your choice because