Appalling Lack of Service or Care from SA Post Office

On Friday 11th May 2018 I went to Cresta Post Office and sent off a document using Speed Services at a high cost of R117-40 in the hope that the Recipient would receive this one page document no later than 16H00 on Monday 14th May 2018. At 10am on Wednesday; 16th May the recipient in Menlo Park had still not received the Envelope (Tracking Number TC ********** 10ZA). When I called ***the gentleman that answered my call stated that the envelope was on-route. When I queried if this was the service that I had paid for it was stated that the "JHB Guys" where on a go slow! No apology was offered nor refund for the failure to deliver my urgent document which I needed to get to my Accountant for Tax purposes. If I had know I would have driven personally on Monday to meet my tax deadline. Appalling service from SA Post Office!