Byjus — For cancellation and refund of fees

As i m not satisfied with your product and after sale services, i tried to reach at customer service and issued my complain there too, they listened it too but not providing solutions to me. and if i ask for solution they seems like there was a network error and they just said hello hello hello and disconnect the phone..
really disappointing please refund the fees i shall submit your books and tablet too you provided tablet without cover i must sent it back to you with cover. please do needful