[Resolved]  Byju's — installation issue

I have purchased for my daughter a students kit for 8th and 9th standard and they have delivered.
Since then it never worked. When i tried their consumer service they told with sony experia z1 it wont work. Then i changed my handset to htc 816. Then they told it wont work with it also. They suggested me to have a samsung tab and i have purchased tab 4.

Still video was not loading, i complained and they promised to fix it and registered a complaint ticket. Finally they sent an email saying that ticket is closed since complaint attended