POST OFFICE WORST EVER!!!! UNRELIABLE

I HAD A LADY MAKE MY WEDDING MENUS FOR ME - BECAUSE OF OUR BUSY LIFESTYLES SHE DECIDED TO POST IT TO ME - THIS WAS POSTED ON FRIDAY THE 15/1/2016. SHE NEVER RECEIVED A TRACKING NUMBER AND WHEN SHE ASKED FOR ONE THEY SAID SHE DIDNT NEED ONE. ALL SHE GOT WAS SOME LAME TAX INVOICE WITH SESSION ID NUMBERS/TXN NUMBERS AND THE TELLERS NAME. IT IS NOW THURSDAY THE 21/1/2016 AND STILL NO POST RECEIVED, SO I DECIDE TO PHONE CONSIDERING THIS POST WAS ONLY BEING SENT TO CAPE TOWN CBD FORES**** WHY ON EARTH WOULD IT TAKE SO LONG. ANYWAYS I PHONE AND THE GUY SAID NONE OF THOSE NUMBERS ON THE TAX INVOICE WOULD HELP-SO I TOLD HIM WHY WASTE YOUR TIME PUTTING STUPID NUMBERS ON A TAX INVOICE IF YOU CANT TRACK ANYTHING!!! I AM ****ING ANNOYED AND ****ING ANGRY - EXCUSE MY LANGUAGE BUT MY WEDDING IS IN A WEEK AND THIS IS WHAT I HAVE TO DEAL WITH!!!!!????? GET SOMEONE TO CALL AND HELP ME WHO IS HELPFUL!!