Hathway — Unwanted service calls even after deactivation

Hi,
I have done a name change of our broadband connection in July from my name to another person's name. The phone number was not updated properly and I was still getting all the calls for last few months even after I told the customer care to update it many times.

Now we have disconnected our connection a week back. And I am still receiving calls for plan offers. Does your customer service not know the line is disconnected? What kind of a process do you have? I have been getting multiple calls DAILY. There is no way to reach a customer care executive to sort this out.

Acc No: [protected]