Invoice defect rate 100%

Ive had my first business customer order and I didn’t go VAT Exempt so it never auto generated the receipt to them , I’ve now set it up on my settings but I’m still getting emails about it as it’s been 2 week since the order.

My Account health hasn’t changed but it still says 100% defect rate so I want to know how I can sort it so it’s back down to below 5% and has no risk to my account .