Refund for their inconvenience

I'm very disappointed on how Greyhound treated me, on the 3/01/2026 I booked a bus from Beaufort West to Johannesburg. Instead of indicating that the bus is fully booked they scheduled my ticket date to 5/01/2026. I called immediately and canceled the ticket because it wasn't the date I wanted. I have been waiting for the refund on the ticket GHBCPQ701 since. Everytime I call their office the promise to call back which they don't do. It marks a month today with out my refund and yet all the papers needed were submitted. I hate to say that they don't deserve no star. They need to improve their services.