Poor Service after incomplete items delivered

I bought items from the Boksburg branch and paid about 80% upfront. I received regular feedback until the day I paid the remainder of the money. I was promised delivery on a certain day, had to call on the day just to confirm and eventually the delivery truck arrived after 17:00 in the afternoon. They arrived with incomplete items and all the drivers could tell me is that they don't load trucks, they just drive. I then called my sales rep who had been an eager beaver before full payment was received who told me he has left work, is stuck in traffic and cannot talk. I expected a call first thing on the following day but to no avail. I decided to call him but he neglected my call and eventually I got hold of him by calling the store's landline. When we spoke, he saw no sense of urgency, didn't apologise for the day before and said he'd only now check with the warehouse. I received a call from him an hour later than promised to say delivery would be the next day, I told him this wouldn't be possible and requested another delivery day (early morning) but even this he couldn't guarantee. I am bitterly disappointed with the service especially since I didn't give trouble with payment.