To install Office 365, visit www.office.com/myaccount on the PC or Mac that you want to install Office on, sign in with the Microsoft account that you used to purchase the subscription, and then follow the onscreen instructions to install Office.
To install an Office 2013 suite, follow the instructions provided on your Office packaging. In most cases, you will need to visit www.office.com/setup and follow the onscreen instructions to download the software to your computer.
Click here for detailed instructions:
For additional support click Here:
Support: https://support.microsoft.com/en-us/contactus# and click Service and Apps to Chat with Microsoft Support. Then click "Office or Office 365 for Windows" or "Office for Mac, iOS, or Android depending on your operating system" and issue.