I know you are hoping that you can get the bitcoins back, but what you've been told is true.  There is no way for blockchain.info or anyone other than the thief to send those bitcoins back to you.

You can try filing a theft report with law enforcement, but they are unlikely to be able to catch the thief.

If you can get law enforcement to investigate and find the thief, please let us all know how you convinced them to care.  In general, most people find that law enforcement doesn't seem to care too much about what happens to the bitcoins of individuals.

Other than that, you can start accepting that they are as stolen as if a thief sneaked into your house and walked out with the $14,000 you had hidden in your sock drawer.

There would be no way to get those dollars back without catching the thief.  The same is true of the bitcoins.