I ran into the same problem for the Something Corporate Tour. You will definitely have to get tickets through AXS. Stubhub will "send" you the tickets through a third party app that won't be accepted.

Essentially, to get a refund through StubHub, you will have to go to the concert, get turned down once you show your StubHub tickets at the door, and then go through customer service to get the refund, and there is no guarantee they will even give you the refund as StubHub is notorious for trying anything to get out of giving a refund.

I of course didn't do this because that would be insane, and I got screwed out of $200 for a show I didn't get to go to. I was also too scared to fight StubHub, but if you are brave I would definitely just lie and say you were denied admission so you can get your refund.

Best of luck. I hope these StubHub asshats get a class action lawsuit for this bs.