I would say to go ahead and put in a ticket now anyway. I had an issue last week, where there was a person in my queue for revenge I could not get out no matter how many times I faced him. And this was happening when I clicked invade, it kept giving me him, and he stayed in my revenge queue. … They responded back to me the very next day.
At least they will be aware of your issue, and could possibly make a quick fix to get your access back into the arena working sooner? Maybe just a simply reset or something similar.