Battlefield 4 Campaign and Online Crashes during "Loading Level" - how to get refund?

Same here. BF4 for me is entirely unplayable. Single player campaign after that 700MB update, everytime during cutscene and loading screen, it crashes, I tried to restart computer again and again, but it still crashes every time.

Multiplayer is extremely laggy and I cannot move and I got killed everytime without knowing what is going on. Even clicking deploy button takes over 10 seconds to get me deployed.

So single player is broken for me, multiplayer either. So I can't play this game anymore.