Hathway — Calling every day and harassing

I have moved in to kerala due to pandemic situation. Since then daily 2 calls from hathway im getting. Apart from that automated call as well. I have told the officials everyday that ill be coming by november and renew the plan. This continues everyday. No matter what time it is. From morning 7:30 to nighr 9 o'clock I get calls from hathway. Its totally irritating and horrible act by any internet service provider. How much every I block the number they call, another call will come from another number, even after activating DND service.

Please solve the issue.

Thank you very much