Again, Stripe's reasoning seems to be that the charges are unauthorised, which is completely impossible since 80% of the transactions have been authorised with 3DS and the customers have gone through a so-called "challenge flow".
We will try and reach out to our customers and reclaim the payment, but I'm not sure how this will go, or how much we can reclaim.
I hope my experience can be a warning to anyone considering using Stripe for their business.