So this is my word of warning:
Don’t put all your eggs in the Wise basket.
The lesson you should have learned here is: Don't put all your eggs in any one basket.
If you are relying on a single provider for some critical business function, then your business is at risk. Period. I don't care how long you've been working with them and how nice their current sales support rep is. Things change. People leave. Companies get bought by other companies and restructured. If you're relying on any single one for anything mission-critical, that's an existential risk.
I agree that your wise story is ludicrous and terrible and hilarious. I particularly love how your bill was rejected because it was labelled as a "Tax Invoice" (we have the same requirement here in AU).
But TBH this is pretty typical of online services these days, and you should have expected this to happen. Google will happily lock you out of your account for no real reason and give opaque reasons why they won't unlock it. I've seen cases of this happening to google employees. Paypal are notorious for freezing funds during product launches.
IMO there should be regulations requiring businesses to have a way for customers to speak to an actual human with decision-making powers. If I was you, I'd be taking legal action against wise and complaining to the government department responsible for regulating these things.