CG would LOVE to remove crystals from fleet arena because it would be hundreds of thousands of crystals they wouldn't give us everyday. Adding more to GAC would be another mistake because GAC is already lame, stale, broken, old, annoying, and tiresome. They haven't updated GAC or TW in years.
What some of us did in both the old squad arena with crystals and the fleet arena is, I asked and when they put me on hold, after getting pushed back too many times, I just burned crystals to refresh and push through to get to the top. I was dealing with 7 people hitting me trying to push me back, I'd climb, refresh, climb, refresh, climb, refresh and push through. After I did that, they reached out to ME and said, "hey what's up?" and we got it worked out. It'll cost you some crystals at one point, but if you become a nuisance, they'll connect with you because it costs them crystals too. (And you'll earn more in the long run) Find out who's hitting you and hit them during their PO climb if you have to. swgoh.gg shows everyone's payout times if you look them up there.
If they don't want to let you in, kick the door in and have a seat.