Mac Online Customer Service does not exist!

I ordered 7 products on Mac online on cyber Monday 30.11.2020 Dawn Wing delivered my products to my offices on Saturday after 3pm, this morning when I opened the box I only have 6 items. I’ve been sending numerous emails and it states this needs to be reported within 48 hrs, I have spent almost 4 hours on hold with their customer service until the call disconnected. I want my missing product I have paid for it - this needs to be sorted out ASAP