Consumer Redressal

I want to put a complain against Tata Docomo for fraud billing and miss behavior due to non payment. Now a days I am receiving many threat calls from many numbers who mention them as advocate or court person. This matter was started from 23.06.2013 and I have tried my level best to resolve the issue by mailing to Tata Docomo and verbally through call to customer care but no action were taken. Rentals were added and bill was increased gradually and finally an amount of Rs.3769 is being claimed by them where 3008 is the wrong amount. Few days ago one lady( 08981016605) called me and asked me to call some Mr.Arun Kumar(09038660592) for some case matter implied on me. I called him and he promised me to short out the matter if I pay Rs.1000 to Tata Docomo. I paid immediately to close the matter and called Mr.Arun for confirmation but he and her assistant,that lady stopped lifting my phone and it was not solved and again I receive some call from Delhi regarding the same matter.Please help me