My game won't ask for serial when I'm installing it.

Hello,
I'm new to this forum, but not new to The Sims 3 game. I've downloaded expansion packs from you, and they all work so well, thank you for that.
However, I have a little problem. I am not sure if something like this has been posted before, if it has then I apologize in advance. I browsed the forum and didn't find the solution which is why I am turning to you...
Few weeks ago when updating my The Sims 3 game I did something wrong, and I had to delete it. I downloaded your torrent, but when I am trying to install the game the moment when a window pops up asking for a serial code it just doesn't happen. I have tried different downloads, the same happens every time. I followed the installation guide on your website, but it just doesn't work for me. I miss playing the game, and I would love to play again.
Any kind of help will be greatly appreciated.
Thank you.

Did you just delete the game files, or did you actually uninstall the game?

Uninstall. Even made sure there were no other The Sims 3 files left on my computer after uninstalling it.