After validation of your order, and in order to allow a fast sending, this one is directly transmitted to the logistic service, which proceeds to its preparation.
We do not have access to your order anymore to proceed to a modification/cancellation.
In addition, the price of shipping costs varies with the weight of the package, any order already cashed, can not be changed.
You will have to wait for the reception or the return of the parcel to the sender, to obtain a refund, which you can request via our Return a product.