What to do next wait for the review to finish (or some longer timeframe has passed) if you are unhappy with the results then you can bring this to a lawyer.

Is it legal, yes it's in your terms? They are verifying its not a scam and not money laundering.

"If it takes longer it will affect our brand identity since it financially blocks us."

Look into additional payment providers you should at least have paypal checkout already on your site.