Download resets

I'm trying to download Battlefield 3 since 3 days ago. The download starts, goes to around 54 % (11gb) and then the percentage goes down to 30% or so. Then it keeps downloading, and doing the same. I checked the Battlefield 3 folder size when it was 54% and it was 11gb, then when it went down to 30% it was like 6gb. 

It keeps deleting and downloading... I will never be able to download the game like this, it will take infinity. What should I do?