No evidence was provided also because they did not send any email or offer any kind of statement,, pdf, anything, to explain what they did. It was a purely silent delete.
And in that hackernews thread we have dozens of people relating similar stories.
But the thread says, “When reached, they could not explain the reason for the cancellation: Them: - We sent you an email. Us : -We did not receive it, can you please resend? Them: - We can't”
Was that on a phone call? Because if not, surely there is some record?