Transferring Amazon Listings/Accounts/Ownership

I had an Amazon account using my LTD company selling supplements which lasted a year before it was suspended after repeating a policy violation.

Following the suspension, my GF took all of my stock and opened her own LTD company and Amazon account and started selling the same supplements – obviously with my oversight.

During which time, I successfully used an appeal service to reactivate my account through mediation.

I have then tried to relist my old supplement listings and create new listings to no success as its gated now – despite countless sales previously. I had also deleted all of my listings during the deactivation period.

We are determining what is the best way to transfer her listings/account/ownership to my name as its essentially my business which she ran during my downtime. Any guidance would be appreciated.