Purchase once made on www.sanjaykhemkaclasses.com  can not be cancelled, refunded, assigned or re-assigned to any one else by the purchaser. Cancellation can be made only and only on account of delivery failure by the seller within 20 days from the committed date of shipment. All cancellation requests are required to be made by mail to: info@sanjaykhemkaclasses.com. The cancellation request must contain the following: Order reference number and Reason for cancellation.