You are correct that I am not a banking expert, but it appears that you have no actual evidence that this is in any way related to envato cancelling your payment, other than that suits your opinion?
In fact, the only official communication/evidence presented here (envato email) suggested that if anything it would not impact your payment for this month?
Would it not therefore make more sense that the ‘rejection’ is Swift and not envato contradicting themselves?
Presumably you went back to them on this email with your evidence to gain clarity and confirmation that they cancelled your payment?