Tikona Digital Networks Pvt Ltd — Bill after Final Settlement and abuse through telephone

Address:

Bangalore Rural, Karnataka

I had a tikona broadband connection, I stopped the connection as I was frustrated by the poor quality of the product and service.
I got the Final Settlement Bill on 18/01/2012 from Mr. Ragavendra (+91 [protected]) and he collected all the device from my premise.

But now they are still sending me bills and calling me every month. Each month I had to convince them that I had stopped the connection. But they will call me the next month.
The lattest bill generated with Bill Number: B[protected] generated on April 20.

Now one of their colleagues has started to abuse me over telephone also.