Post Office please change slogan to "WE DON'T DELIVER"

Received mail pieces via street delivery on the 8 of June 2022 which were date stamped anything from January 2022 up to March 2022. How can any company deliver a service with a delay of up to 5 months? Pathetic service to say the least. And these are the mail pieces which we're delivered! What about the mail which disappeared?