Very poor customer service from Clearance Warehouse Africa

I lay byed 2 Leichester Wing Back chairs from Clearance Warehouse Africa in Centurion on 7 July 2020 and paid off my lay bye on 28 September 2020. I was advised that delivery will occur within 14 working days. After the 14 days lapsed, I contacted a guy by the name of Thomas who works in the logistics department to find out when they would deliver my chairs. He kept on advising that they would generate my invoice and get back to me once they have stock. On Tuesday 27 October I advised them that I would like to cancel the order and request for a refund. I was given the following number to call for cancellation ***. Each time I call this number it says call transfer failed. This is very frustrating and tiring. I am very disappointed in the poor service from such a reputable company.