Comair - Worst Ever

Booked a domestic flight for my mother for June 2020 from Port Elizabeth to Johannesburg being her connecting flight abroad for holiday. The tour was however cancelled. That a voucher request needs to be submitted for the flight. If they dont want to refund me my money then surely they can ensure that my mother may make use of the flight at a later stage. Received several emails declining the voucher application and declining refund. Unable to contact telephonically. No point in send emails and no response is forthcoming irrespective of the fact that the emails are sent at least twice a week, When you phoned an automated message refers you to the website for answers but to no avail. So BA Comair basically stole my money.