Tata Docomo — broadband service not available from 15 dec'17 till march 18. tata docomo not waiving the cost as bills were paid

Address:	411048
Website:	www.tatadocomo.com/en-in/internet-wired-broadband

There was no or very low broadband service starting starting 15th dec'17 till mid feb'18 for a broadband plan of "limitless 5 mbps ul @ 2999". I had raised multiple compliant between this timeframe in customer care. I was always informed stating that technician are working on it and the problem will be resolved at the earliest. I was also asked to pay the monthly bill so that service continues and the amount will be refund once the issue is fixed. Now when the issue is fixed i have been requesting the tata docomo billing department to offset the forth coming bill with amount paid for dec'17 and jan'18. The stance taken by the company is if "you were facing problem in those month you should have not paid the bill, there is nothing we can do about it now"
I am not making any bill payments henceforth. I have also written multiple mail to "[protected]@tatadocomo.com,
Appellate. [protected]@tatadocomo.com", but there has been no progress on it. I have also raised the issue on social media sites such as facebook and twitter, but again no progress. My account number is "[protected]" and complaint number is
16 dec'[protected]
21 feb'[protected]
26 mar'[protected]
In above complaint number i have been given waiver of around rs. 2000 for feb bill and been asked to pay rs.500. Whereas i am also asking for the refund of bill paid for dec'17 and jan'18.
I need your help to resolve this issue.`