[2023] when downloading the game, steam opens...

I abandoned rainbow for a couple of months. now I decided to play it again.
I download uplay, go to my profile, click on the "download the game" button and for some reason a steam opens for me... I have written to support, support has not been responding for 3 days.
I bought the game through a key. it turns out I still have the game on my PC. if I run it through a folder, then he writes to me "enter the key to the game", I enter the key and he writes to me "the game is activated on another account".
I don't know what to do anymore...