Microsoft Office Home and Business 2016 product Key missing

My company bought a new computer, ordered and paid extra for Microsoft Office Home and Business 2016 25 digit product key card was never shipped with. 

How do i get a copy of the product key that belong to my company? and without the product key, I cannot activate the software. Out of over 40 computers my company have bought from Dell, this is a first.

I've had less than stellar experience with Dell customer support by email on another matter because their english is non existant. Meaning, they do not read what I am trying to explain. Instead they send generic forms.

Also, phone is out of the question because of language difficulties with heavy foreign accents.

thank you, Kate