Shocking service and Non-performance

I posted a package counter to door from Postnet uMhlanga Ridge. Two week later it was not delivered. The package was delivered to Postnet Meadowdale instead of to door. The charge to door is double that of counter to counter. Two weeks later I flew to JHB, collected the package myself from Postnet Meadowdale and delivered it myself. The service was not carried out. I asked for a refund. I get an email instructing me to go to Postnet uMhlanga Ridge. On the 6 December 2019 I visited their store. uMhlanga Ridge refused to do the refund as they needed to confirm with head office. I have no issue with them confirming. I have sent a few email subsequently, nobody bothers to reply. I am still waiting for Umhlanga ridge to contact me. Pathetic service and non-performance.