[2021] Lost saved game

Hello there, I'd like to post about an issue which I encountered recently, any help on the same would be highly appreciated, two days back my brother started playing valhalla on his pc using my credentials, he started a new game of his own (I have already finished the game with 100% completion in around 165 hrs of playing time), the deal here is, my brother somehow has overwritten his manual save on my saved file, are there any means for me to recover my saved game? I really don't want to lose out on the efforts that I've made.