Waiting for a R6000 refund for over a month

Paid for a service in advance on the 12th of November and made an appointment on the 15th for said service to be done on the 26th. I was phoned on the morning of the appointment, 26 November, to be told that it cannot be done as the items had not arrived and was told to reschedule to a week later. As I had wanted it done for a maternity photoshoot the next day, I cancelled the appointment and requested a refund which was agreed upon. It has been just over a month since, and I've followed up 8 times for said refund to be made and was promised by the manager that payment would be made a certain date on four occasions - those dates have passed with failure to do so and without any reasoning or explanation!! It is not R100 or R200, it is R6000 and I've been blatantly **** to. I've always been happy with the salon staff and hair treatment services I've done in the past and have recommended the salon to friends and family, but this experience has unfortunately put Bionic in a very bad light. I was at the Salon on 24 December, their last operating day for the year, and was told that the payment would made that day and I would receive the proof of payment, I raised the concern that payment must be made as it is their last day of operation for the year and they only reopen on 10 January, to which the manager had responded that "although the salon is closed, he still works throughout" I phoned the salon on their landline and it goes to a voicemail and on the whatsapp line with no answer. I also sent a message on WhatsApp line and it has not been read. If this is how Bionic chooses to treat their clients then I would prefer the refund to include all other remaining deals that I've paid for in advance.