No, once order is placed you cannot change the shipping method.

A Tracking id will be sent to your registered mail id once the order is shipped from our end; you can track the shipment anytime.

You can cancel your order before getting shipped. Once the order is shipped youcannot cancel it.In case you refuse the parcel on time of delivery, a charge of $10 will be imposedand it will be deducted from the refund money (for shipping and return)

No, if you have added all the items in a cart and ordered them altogether then it
acquires same order id and ships altogether in a same parcel/shipment. If you want
them separately then order in different carts.