Hathway — Dont call and message me

I have returned the device(modem) to hathway two month back, My account has been terminated.
I have requested multiple times through mail & call to stop sending messages & calls to my personal number.

But Still I am receiving messages and call everyday, this is frustrating. I have already informed to the customer care about this multiple time.

So I am requesting Hathway people, stop sending messages and calling to my personal number.

for Hathway
Don't reply as below.
Hi, Appreciate you reaching out to us, we understand how inconvenient this could be. Please share your Contact number and City, an executive will get in touch with you shortly. Thank you! Hathway Customer Support Team.