When a payment has already been initiated, editing any of the details is impossible.
Additionally, it is not possible to change the cryptocurrency address once your payment has been already initiated and when it is approved. Once the cryptocurrency is sent, we have no more control over it, and our part in the transaction is over.
Please note that it is only possible to cancel your transaction if it is still pending. After the cancellation, you can issue a new payment with the correct cryptocurrency address or details.