Reliance Communications — Payment for Broadband

Address:

Mumbai Suburban, Maharashtra

I was using broadband connection of Reliance from Jan 2009 & have been regularly paying bills upto Jan 2010. But in Feb 2010 my net connection stopped working for which i had launched a complaint, which till today has not been solved. More over for solving the problem they had removed the cable that was damaged to install new one, but no one came back after that.
Now they have sent me a letter threatening legal action for a connection that doesn't even exist in my home saying to pay up the dues for the same.
Kindly assist me to resolve this problen & also indicate how to send the documents related to the complaints i launched & the letter that has come to me