Pathetic service from PostNet

Good day

My sister sent me a package on Saturday 17-07-2021 from Pretoria to be delivered to PostNet Bloemfontein Waterfront. Yesterday 21-07-2021, having not been contacted by PostNet Waterfront, I tracked my package and followed the link to find about my package and was put through to Aramex where the call centre employee took down my waybill number and informed me that my package had already arrived in Bloemfontein on 20-07-2021 and told me that I should have been contacted. Upon learning this, I went to PostNet Bloemfontein where an employee told me that no deliveries from Aramex had arrived. This is absolutely unacceptable! Which information is correct? What has happened to my package? I tracked my package on your website and it is said to have arrived. I am completely disappointed by this incompetence and I won’t be using your services again and I certainly won’t recommend that anyone should! This franchise is pathetic. It is Thursday 22-07-2021, I want my package!