Upgrading game version

Hey. I was bit worried after hearing about technical problems, so i bought the standard version from EPIC store. However, now that i´ve seen its fine for me, i would have wanted to get the Super Deluxe edition. There is no way to upgrade my game version though, and EPIC gamestore said they cannot help me in any way (They actually lied to me saying i can buy season pass separately and get all DLC that will come with any version of the game). Is there anything i can do?