Hello Phocatox03, thanks for posting on this thread, where it says Additional email options for invoices if you click the drop-down arrow in the box and select  Plain text save and close this should now not show the review and pay for you. Apologies I missed that step-off in my above post. 

so the full steps are: 

main cog wheel> account and settings> sales> scroll down to online deliver> tick show full details in email and tick the box for PDF attached >  under additional email options for invoices/ select drop down and click on plain text> save and done