********** cancellation experience and threats

In terms of network issues, there were not many. And the technicians are experienced and helpful. However, with the overall negative encounters I have had with the organisation, any positives are overshadowed. Service falls below 1/10, as there is never a resolution, and consultants have been trained to follow a set script when one has an enquiry. It seems as if they cannot deviate from it. After years of service challenges, I terminated my arrangement as my apartment lease expired (just after my husband died) Although I emailed at the beginning of August (the first working day), my email was ignored and after a delay I was advised that emails were not accepted. I had to cancel online; this made my effective cancellation from the third. After I vacated my apartment at the beginning of September, I had no access to any internet and was out of town. I received a suspension notice. Because cancellation was not the 1st, I have been hounded for a month's payment, even though the company suspended my service and had cancelled a month before. A few days ago I received a threatening letter from the legal department (blacklisting etc). As no constructive response has been received or actioned 'to' my numerous emails over the months, is there another remedy? I am considering contacting the NCR.