Consumer protection deficiency of services bsnl

Im using bsnl landline and broadband from 2011. From 2011 I m not able to use land line (noise problem) but broadband working with frequent disconnection. On November 18 2015 problem of land line is rectified . but I paid for both services monthly rent of rs 707(BSNL RURAL 650ULD plan) using bsnl landline and broadband from 2011. From 2011 I m not able to use land line (noise problem) but broadband working with frequent disconnection. On November 18 2015 problem of land line is rectified . but I paid for both services monthly rent of rs 707. 1. Is it possible to suit against bsnl for deficiency of services? 2. What all the documents needed to prove deficiency of services? 3. How to prove the problem I don’t have complaint copy? 4. Where to file and what s the charge? 5. Is it possible to get compensation after the problem rectified? (from 2011 problem starts but I paid the charge for not using it on November 2015 problem rectified) 6. If time limit expires to suit what all reasons to satisfy the court to take this compliant?