Tikona Infinet Private Limited — fraudulent billing

Address:	Tikona Infinet Private Limited ‘Corpora’, 3rd Floor, LBS Marg, Bhandup (West), Mumbai 400 078 CIN:U74899MH1975PTC265837, Mumbai City, Maharashtra
Website:	www.tikona.in

Hi,

I took the tikona broadband connection account #[protected], on 20th nov 2018. This was a prepaid connection with quarterly renewal. After completion of 3 months i did not like the service and did not renew the service. I also raised a complaint for not getting the connectivity on my modem.
On 16th march i got a mail from tikona that if account is not renewed the service will be suspended (Email screenshot attached).
On 4th june suddenly i got demand email notice from them to pay 2800 inr. Since then tikona is threatening me and harassing me stating i have to pay the money or they will recover it somehow.
I told them this was a prepaid but they keep calling me and threaten me.
Please help me with this