Failure to refund cancelled flights

In January this year, Cemair cancelled the flight my mom (a pensioner) was due to return to Margate on from Jhb. This was due to them being grounded. She had to book and pay for another flight to Durban. Cemair promised to refund the airfare of approximately R1700 within 6 to 8 weeks. All forms were completed and returned by the 14th January and despite many requests and promises from Cemair in return, she has still not been refunded. Cemair published press releases assuring their passengers that they would be refunded. All lies as it has now been 8 months and still they don't honour their promises. Why are they getting away with this?Below is their last reply:

On Mon, Apr 15, 2019 at 10:39 AM Cemair Reservations <***> wrote: Dear Gloria,

Thank you for your email.

I noticed that your booking has been logged for authorisation by the finance department, but unfortunately it has not been approved as yet.

Please bear with us, as we are currently experiencing a back log in the refund process.

We apologise for the inconvenience.

Kind Regards,

CemAir Refunds Team