How to allow a SCORM assessment to be retaken

Hi,
I have Health and safety onboarding modules for a client. They are published in SCORM on our Peoplefluent LMS, in a program containing the training and assessment.

Only the assessment pushes a note to the LMS, the success status pushes a "completed" status on the program. There's a trigger on the LMS that sends a notifactions for failed/success by email.

The problem is, our client would like to have the possibility for its users to retake the assessment without ask our team for a retake licence, as it takes time to process...

They said their previous supplier site has the ability to do this : The users passes trough the assessment, saw it's results and retake it if he was failing, until they had a success and printable certificate. (but they didn't get notifications or certificates with the notes, so I suspect it was no SCORM at all...

I know you can't refresh a score on the LMS coming form the Storyline file, but anybody got somes ideas how we can trick the result slide...

- When result page shows failed = action : restart assessment from the start
- When result page shows success= action :
-produce a certificate with name, date, name of the training and result
-send the result to LMS

I think they are asking too much but it worth a try to get your precious and very competent advices.

Thanks Heroes!