Hi 20191001myob
I think you have the right idea in terms of reversing the invoice to generate the credit note.
What you want to do though is go to Sales>>Sales Register>>Returns and Credits>>Highlight the credit and select Pay Refund. You would also need to complete the full reversal and Pay Refund process for the other invoices as well. This will generate a series (3) of bank withdrawals that will match the original payment amount.
Completing that process would take you back to square one where you can generate the invoices again and apply the necessary payment(s).