Paid $2400 to Cloudflare, support refuses to help

I signed up for Cloudflare's Business plan and paid for a year in advance. While adding a new domain I made a typo and now the subscription is stuck in a limbo.

I can't change the domain without contacting their support or paying another $2400. When I open a support ticket, their portal shows 'Unable to find your account' and tells me to open another support request for it.

All support tickets are closed automatically by their "AI" which points to the same article that says open a ticket.

Is shaming them on Twitter my only option left?