Hathway Cable & Datacom — regarding legal notice on no return hathway modem

Address:

JP Morgan Towers, Windsor Lane, Kalina, Santacruz East, Mumbai City, Maharashtra, 400098

Hi,

I had taken a connection from hathway in bangalore when i was there for a two month stay. After availing their services for the stipulate duration, i called their operator to collect the modem before i was about to leave. And he did not turn up.

I had to leave on time and i was putting up in a rented place.
Today, suddenly after 20 months i get a call from them stating that i have to surrender the mode. And am threatened by legal action if i don't do so.

This is annoying, disappointing and outraging given that i have been repeatedly getting unwanted calls multiple times (For sales and not related to the matter) and thi is the first time that they have informed me regarding something like this.

This even after i had already paid for the modem initially.
Please let me know how to deal with this
And help me find a solution.

Thanking you