Byju's — I am complaining about returning and refund from byju's

Address:

Bangalore, Karnataka, 456331

I have ordered byju's tablet on 10th september for my son who is studying in class 9th as a person named rahul from the organization came to us. He told that it will be helpful for ntse and olympiad preparation. We received it on 16th september. The product we got is not up to the mark. It doesn't consist of anything related to olympiad. Moreover he told that we will get two mentor also. But still they didn't provide us any details about any of them. It is not helpful for my child of class 9th. So we want to return it. And want the refund also. Please help us.

Regards
Solat naqvi