If you wish to return the order fully or partially it is possible only while the delivery person is still at your door step. After he departs, you have 7 days period to return the parts with condition of not been used and it is in the original boxing.
In the unusual circumstance where the order fully or partially received is wrong, you can return it with the delivery person while he's still at your door step. This is why we encourage you to inspect your received items in presence of the delivery person and before he departs.
In case you cancel your order, the return value amount will be returned to the card account used less any fees or commissions have been truncated by the service providers of the cards on the process. This amount can be shown / reflected in the card account within a maximum period of up to a month, depending on the speed of bank procedures source card.