Please Deliver the envelope

Package (envelope) were handed in at Rayton Post Office on the 15th of May 2018. It is for delivery in Port Elizabeth. It was sent toTshwane mail office on the 16th 12.36. When I investigated the non delivery of this envelope I was told the toilets are not working and the delivery can't be done. I dont understand??? can somebody please help me.!! Track & Trace RD ********** 66ZA Marietjie