gokayy, I'm very sorry for your troubles but they won't be able to recover your lost data. All I can say is keep playing to build those levels back up. Your save most likely became corrupted or one of the hotfixes/patches wiped the save.
You can try doing a File Restore on your system by making sure your PS3 is powered off, and then holding the power button until you hear three beeps. You will get a prompt to Restore System Files and then you just need to adjust your system settings in the XMB to get your screen resolution or audio settings back to how you had them previously.
This will remove any corrupted files.