If your order costs less than the total of your e-voucher , the difference will be lost.
Rule 6 - Questions Tech support questions are no longer allowed to be posted as of 10-Jun-2020.
Unfortunately, the answer is usually no.
Follow the Epic Games Twitter account at the handle EpicGames.
Please remember to obtain Proof of postage from the Post Office.
Wave 1 Pre-Orders - 19th October 2021 Update: 14th January.