installed ubuntu 14.04 kylin over Linux Mint - deleted my data partition

I had linux mint installed in my computer in one partition and had another partition for Data.

I just installed ubuntu kylin 14.04 and during the installation there was an option like "install ubuntu replacing linux mint", which was the one I chose, thinking it would just mess with the partition of linux mint.

Now I boot in ubuntu, and I have a huge partition with Linux (bootable), including the space that was before of the data partition...

Do I still have a chance to recover some stuff that was in my previous Data partition ?

If so how can I do that ?