[Resolved]  Byju's — packaging issue

I have ordered a sd card along with tablet of lenovo of 11-12 jee. But the tablet that i have received is of another company and is used one in the box of lenovo. I have called the mentor but there is no response.in fact the app is also not working properly on the tablet. The same thing happened few months ago one i have ordered for my sister but at that time the tablet was replaced but this time no one is correctly responding. I don't know why the same the same thing happened twice and no one is correctly explaining what to do next. It had been huge inconvenience.