Hathway — Harassment calls and messages

I was a customer of Hathway some time ago. I have terminated the connection and I have also submitted their modem. But I still get calls and messages asking to submit the device or it would incur a penalty. Also I keep getting calls from a lot o[censored]nknown numbers and they keep asking about renewing the connection. Even though I have politely asked them to not call me regarding this, they keep calling me at all odd times of the day. I hope I am making this abundantly clear not to call me to ask for account renewal. My account number was [protected]. Attaching a list of numbers that I got calls from in the last few days. Someone please take action regarding this I don't want to get these many spam calls from Hathway.