Deliver my order urgently

I ordered distinguishing devices from South African Nursing Council in September 2020,they immediately posted them to me on 02-10-2020 .I am yet to receive those distinguishing devices instead I am sent from pillar to post by post office more that they acknowledge recieving them what is appalling they can not locate them, this is the worst service I have ever received I have phoned them and emailed them reference number PA***ZA