FlySafair sale errors, not refunded

I was double charged for a booking which I made during the Flysafair sale on 01 deNovember. I have liaised with them via email and through their support desk. First I received an email assuring me that they were aware of the error impacting on multiple clients but that refunds would be processed automatically, however it is now 20 days later and I have not received a refund. When I called the helpdesk they had to log my refund request even though this was meant to have been automatic, My refund request to the support desk, for which I was told no reference numbers are issued, was logged on November 9, and still I have not received a refund.