Consumer Redressal

Hi I had a tikona wifi connection for last 3+ years. When I finally stopped using it, the customer care person called me up 7 told me to hadn over final payment of that months due to the collection person who will take the full 7 final form filled 7 duly signed by me. all these were done 7 still after that the company was delaydillying too much w.r.t disconnection etc stating that disconnection request accepted on said that(although no said date being mentioned!). They had also told me that they would send someone in person to collect the modem etc but that did not happen from last 2 to 3 months although bill stil were being generated 7 sent to me!! today, someone stating that he is from tikona legal cell called me up & threatened that they will send legal notice etc. I own my part have acted righteously co-ordinating with them 7 thus signing 7 handing over the due bill and signed full & final form.Still as a customer, this harassement metted out to me. I want this to be addressed plea