Can we cancel EFT /Wire payment in Cash Management??

Hello,

We have an EFT/Wire Payment was created in Cash Management(CM) and approved so this went into Financial Gateway(FG). The payment was dispatched and now the status is "Paid". For some reason this payment was not supposed to go out so we had to stop in our internal system(which sends the file to Bank for settlement). How do we cancel this payment in CM? We tried in FG but not allowing to Cancel, the only thing we can do is change the status to "Error".

Accounting Entries ere generated for this Event(Payment) and posted in GL. Now we need to reverse this entry. Please let me know the delivered options for this issue. Really appreciate your help/ideas.