pick n pay appalling online delivery service

I purchased from pnp online on 02/03/19 selecting delivery for 04/03/19 between 15;00 and 16;00. I waited to no end for the delivery until at about 17;30 I decided to call customer service to find out where my order was. I was told the truck broke down and my order was rescheduled to the next day 05/03/19 at 11 am. No one bothered to pick up the phone to call me or email me to tell me this. Guess they assumed I am at home waiting for them to bring my items that I paid for myself including the delivery fee (instead of working somewhere) after making means to ensure the time chosen had someone ready to pick up the order from them. On 5th March they arrive at 12:25 (again a whole hour and a half later than what they said) and they bring half the things I ordered. They again, promise to bring the remainder of the order later in the day (5th March) because they forgot their cooler box somewhere. Its now 8pm (5th March) and I'm still waiting for this later delivery of the reminder of my purchase, again no phone call or even an email to apologise and excuse themselves. I don't know what this is supposed to mean but when I ask for delivery at a specific time and actually pay for the service I expect delivery at that time. I would like my delivery fee refunded to me because I then had to go buy those things I needed in that order on the evening of the 4th and I also spent my own airtime ( a whole 14 minutes waiting on the line) on 04/03 to call their customer service to find out where the H*ll my order was, spending 14 minutes on the phone while the poor guy was trying to figure this out. meanwhile my order was rescheduled by the manager without letting anyone know. Such appalling service, I cant even describe my disappointment. don't know why I even bothered with them because it's not even the first time they fail to deliver. Just thought things are better.