Hathway — Please stop calling me

I have Hathway broadband connection for a few years now in Aurangabad. I have paused my connection now as I have been staying in Mumbai since a few months.

I have been getting incessant calls from them since the day I stopped my connection. Everyday, I have received 5-10 calls. It doesn't work to block them as the calls are from different number every time. I have asked them on the call to stop calling multiple times but they haven't stopped at all.

This is outright harassment. Please stop calling me!