But, on the other hand, I felt that the tone was a little bit strange. Stripe doesn't have to do business with you, or anybody else. It's not offensive to my sensibilities that Stripe has it's own processes and concerns as it relates to it's customers (not to mention regulatory requirements).
And this bit stuck in my craw "..So overnight without warning Stripe had decided to stop us from using their services after 5 days.."
That email was your warning. You did, in fact, get a warning. You got 5 days to change payment processors.