Poor delivery service

I made an order online a week ago. On the day the delivery was supposed to be done, the parcels were not delivered. They failed to update me as to why until I decided to contact them. I was told the driver probably had a lot of parcels and didn't have time to deliver mine. My order was said to be re'dispatched the next day. The following day, I got no update on my order, when I contacted them again, I was told the driver had tried to call me the previous day and I did not pick up of which was not true because they had varified my contact details. The status of the order had been falsely updated as such that I didn't get the order as a result of missing their call of which never happened. My problem is, if the issue is jot with my contact number, what was done to pin point the reason why I had not received my order. Furthermore, the assistants were gave poor service, because I made it clear that the issue is not with tracking my order I can do so myself on their website, the ISSUE IS THE FACT THAT THE ORDER WAS NOT DELIVER3D AT ALL FOR REASONS THEY CANNOT ACCOUNT FOR. The Mr price assistance can't assist me effectively instead they want to pin the blame on either myself n the driver in a sense that they assume my contact details are invalid. I had not received any assistance , I do not know when the order will be delivered. At this point I want a full refund