Can't cancel my plan or remove my credit card

I was trying to switch my account from US -> AUS

I clicked cancel and it did not give me the options to add a plan. So I clicked "Reactivate". And now I can't edit the plan.

It says I need to contact support but it's been 3 business days and there's no response. I'm heading overseas soon and won't be able to resolve this while I'm overseas. Seems crazy that Zoom's system just removes the ability to stop paying them money.

Any idea how I can resolve this?