Ultimate team

Ultimate Team won’t let me assign players to positions or put abilities on new players Every time I try, I get the error: “Our system can’t process your request at this time.” it’s been doing this for two weeks. The fact that you have to spend money on this pay to play game and then when you do, you can’t even use it, I’ve tried everything—uninstalled, cleared MAC address, power cycled, rebuilt lineup—and nothing works. This is on Xbox Series X. I’m unable to use content I paid for. I need either a fix or a refund.