Ticket Refund on cancelled flight

The airline cancelled my return flight on 12 December following the withdrawal of their operating licence by the Zimbabwe Civil Aviation Authority. I have send several email requesting them to process my refund. To date, my refund has not been processed. Initially they send and email saying that the refund will be done within 40 days from the date of cancellation. They don't respond to emails, they do not respond to their call centre number *** and the only way to contact them is via email [Email Removed] to which they don't respond. The Zimbabwean Sunday Mail of 6 March 2016 has quoted the airline saying they have refunded all travellers whose flights were cancelled, which is a clear misrepresentation.<br> <br>