You can Track your order with your order Id and registered email.
Click on track orders in footer and enter your order id and email. You will get the order status.
You can either cancel/change the order before the time duration of the delivery of the product. Once the product is delivered it can't be canceled or changed.
If your ordered products is not delivered within a week;
You can cancel the order.
Your amount will be refunded.
Or you can exchange the fund with another product.
You have online payment options. You can either pay through net banking, or through your debit/crecit card or you can pay through UPI or you can scan the QR Code or through any wallet options given in payment gateway.