Office home and business Premium "service unavailable", product key activation

I purchased office home and business premium through a third-party service and have successfully redeemed the product key and manage to get through the first step of activating my lifetime subscription. However, when I am navigated to the 64g or 32g page, I select the appropriate gig for the product purchased, and once I initiate this download, I am brough to a page indicating that service is unavailable "we are having technical difficulties. I have deleted all previous versions of word on my device, and followed each step shown available. This is my second time purchasing this product due to having similar issues and am hope that this post will provide me the guidance necessary to finally activate this service to my current Microsoft account. 

Thank you in advance.