Hey there @le_bothan
If the order has already been completed and all, you should be able to refund that if it matches the Great Game Guarantee's requirements.
From this guidance (https://help.ea.com/en-us/help/account/returns-and-cancellations/) , these are the requirements:
- Within 24 hours after you first launch the game
- Within 7 days from your date of purchase
- Within 7 days from the game’s release date if you pre-ordered
Are you able to refund your game from this page ? https://help.ea.com/en/refund/
If that fails, I would try to reach an EA Advisor at the EA Support and try to get yourself to a Live chat and ask them could you change your Standard preorder to a Deluxe one instead. I know it may be annoying, but at least Live chat is better than a phone call, right ?
Here's a link to the support: https://help.ea.com/en/contact-us/
From there, first from the top right, choose your region and make sure you're logged in. Then choose Star Wars Battlefront II from the list of games, choose your platform, choose 'Orders' as your 'Topic' and 'Cancel preorder' as your 'Issue' or alternatively 'Request refund' . Answer the rest of the questions and a blue button with "Select contact option" should appear so click that.
You should be given a choice for a Live chat. Remember though that your region does affect the choices given to you so if you are not given the Live chat option, try changing your region to something like the UK or the US. Be also mindful that today is Sunday, so the support crew runs with a skeleton crew due to holidays. It can be easier to contact them on a Monday but you can still try your best to contact them today.
If you need any further help contacting the support, please refer to this link: https://answers.ea.com/t5/Technical-Issues/How-to-contact-an-Advisor-via-EA-Help/td-p/5650100
Good luck !
EDIT: P.S: I totally agree that they should have a Deluxe upgrade available. I guess they didn't think it would be needed before the game is released as majority of people wouldn't think about upgrading their game before the actual release date.