JustDial.com — Justdial and its spam calling

Justdial keeps calling me every week regarding the business I have closed. I have told the agents multiple times, but they keep calling me. As soon as I ask them to stop calling me or transfer the call to your supervisor, they just disconnect the call, and after a few days, it's the same story.

Is this how you do business by spamming and harassing others?
One of the most annoying companies I have ever seen.