Missed Delivery/Attempted delivery today

I ordered an item over a month ago and this is what is says when tracking it,what does ZA33332 Missed Delivery/Attempted delivery today mean?<br> <br> 22-Nov-2015 11:27 Received by Post Office 543002 <br> 12-Dec-2015 00:44 Arrival Import customs JIMC A <br> 15-Dec-2015 02:38 Held by customs JIMC A <br> 22-Dec-2015 09:10 Departure Import customs JIMC A <br> 29-Dec-2015 10:23 Unsuccessful delivery ZA33332 Missed Delivery/Attempted delivery today