I don't recall onboarding being an issue for me. What are they telling you?

I own a marketing agency with 250 people and want to spend $500k a month lol.

My best guess is that have two X accounts, one personal and one business. Both are premium but maybe that throws a flag?

I'm checking in the next couple of days, so feel free to ask me anything if you're thinking about setting up X ads yourself :)