Debt collect nonsense

Multichoice you are a service provider paid in advance. I haven't gad dstv for a while now., yet someobe is callong me with regard to an outstanding account. I entertained the one lady yesterday, telling her I dont owe you, the poor guy who called today wasnt that lucky. Stop harassing me. How can I owe you, of there's no payment you disconnect. Disconnect from me permanently please, and leave me alone.