Loathing the USPS

Let me just tell you, there are no words to express my displeasure with the USPS at the moment.  They have hosed me yet again.  Tried to send a package to my mom on Jan. 5 and she still does not have it.  The only thing they can tell me is that its at the post office which is conveniently closed today and Monday.  So much for 3 day!!  What a frustrating thing to have to deal with on Saturday morning.