Hey Cøde!
Please get in touch with our Support team to help accommodate this. Do note that as part of this, they would still need you to purchase the Name Changes for each characer - all they would be able to help with is making sure you do not lock out either of the character names you want to swap around as you’re doing it.
Do not delete and then try to restore a character as others have suggested, you will not be able to undelete a character that has the same name as an active character and it will make it much harder for our Support team to assist you.
Best of luck!