SABC ignoring termination of service

We had to close the guesthouse by the end of March 2020. I cancelled Multichoice and the SABC TV licences by the end of June. I requested a refund for the month of July until September when the renewal was due. SABC TV Licence has not only not responded to the Cancellation but has now send a renewal invoice as if nothing has happened. Emails to SABC get ignored.