Acer India — ms office with windows 10

Address:

New Delhi, Delhi, 110025

I have purchased an acer switch one laptop on 3rd may 2017 with windows 10 as the operating software. But sine the inception i am not able to use any ms office software and it shows to upgrade and purchase the new one. Why this problem happens? I have purchased this system on the assurance from the company that i can also get office suits with the computer.