Reliance Broadband — Charged against different plan

Address:

Bangalore, Karnataka

Last year in July I took reliance broad band connection with plan commited to me by the sales team of Rs.999. I also paid initial payement of Rs.2900 as demanded by the executive. But after one month of connection I started getting billls of Rs.2450 which was denfietly not on ,and after lots of calls and emails, which was NOT RESPONDED at all by RELIANCE I somehow managed to get broad band disconnected in September. With no follow up from Reliance on the bills I assumed everything has been sorted out as I have already paid Rs.2900.
But after alomst one year, I have started getting threating messages from reliance to clear all the dues ELSE they will take LEGAL action. I should be the ONE taking action against them but JUST to avoid unwanted hassales LET it go. BUT now its too much and getting such msgs from them is very harrasing.
If anyone can suggest an amicable way out then let me know. No way I am going to pay the extra money for the FRAUD planned by RELIANCE executives.