amend or reverse a payroll submission

I have been trying to find the answer to this but any similar queries are about 6 years old - I am using MYOB payroll. I have 12 people ot pay but in two different cycles. When I create a payroll I tick the ones to be included (or untick those to be excluded). Yesterday in error I failed to untick the 9 I wasn;t paying and have finalised the pay run with IRD. I can address this with IRD myself but I need to correct the incorrect pay run in MYOB by either removing the nine unpaid employees from the report or by deleting and starting again. I can;t find anywhere how to do this and any attempt to utilise either the chat support or community forum leads me nowhere useful. Is there someone who can assist and point me in the right direction on this please