men i purchase 3 keys of office 2016 ( 5 pcs ).
all not working
when acess https://setup.office.com
this key get the error

Sorry, we did not find this product key (Product Key) in our database.

If the product key is for Office 2010, Office 2007, or Office for Mac 2011, you can redeem your product key and download Office here.

If your product key is for Office 365 for Business, you can redeem it here.
 
Error code: ERR_INVALID_TOKEN
Correlation ID: 5ef71adb-e939-4534-a154-7742703998b1

Can you help