Sage MBA interview questions

I had applied to position A. After a week, I got interviewed by the HR but then was asked whether I'd be interested in another position. I said yes. After another week, I get a call for position B but instead of the regular Q&A process, I am asked whether I have any other proof-of-work from my experience at a company 4 years back. Obviously, that was a ridiculous ask, especially because I am doing MBA. Still, I said I'll try my best to obtain. And that was it! That was my interview. After I managed to obtain something relevant from my archive and sent it, I got a reject within a few hours. I was not tested on my knowledge and skills.