Couldnt find it.
And the software i did it successfully was not free. But i got it from torrent websites. It was a lot of work and now internet is full of ads and crap articles wasting our time. Sorry mate cannot help u. Not even myself if i get this peoblem.
All i remember is that i backed up whatsapp data on i drive. Then that software downloaded old software on my iphone and changed things in backup and then put them on iphone in old whatsapp which cannot be downloaded theough itunes. After whatsapp was there and backup onto iphone arrived and saved. Then i updated whatsapp and all things of my friends were there. Exactly the way they were on his android except videos.
Dont eemmeber the softrware and couldnt fund the way to get to that software. Maybe need more time because its always trial and error the way articles are posted on internet. Lots of fake stuff as well in the form of freeware or subscription based softwares out there.