license transfer issue and the previous owner didn't transfer it

when I bought the item from the previous owner he is actually the third owner and the previous owner just transferred it to the man who sold me it but he made me wait 60 days and gave me his acc acc in native instrument and I used it for months to use my mk3 mikro and since I had his acc there are 3 licenses on his acc but those licenses aren't transferable I asked him fora screenshot of the license transfer that the previous owner of the item that's been sold to my seller he showed me this

I tried putting that transfer id but it expired also when he sold me the mk3 the serial on the butt of the machine mikro is scratched off and the box didn't include papers so basically im empty handed all I have is the item I asked some help from native instrument group on Facebook and I've been asked to ask for his google acc password aswell so I can request in native instruments like I was him because I was told that the only option I had is to work with you guys so you can handle everything and I call it a day