After reading your problem there are clear indication of physical damage to the drive so, to recover your data i would suggest you to consult a data recovery expert company. Also don't tamper with your hard drive because it will make bring permanent data loss situation.
-
-
Physical hard drive failure situation should be handled by professionals in a controlled environment of class 100 clean room labs.
+
Here's the issue Apple had a bad run of SSD units: [http://www.apple.com/support/macbookair-flashdrive/|MacBook Air Flash Storage Drive Replacement Program]
After reading your problem there are clear indication of physical damage to the drive so, to recover your data i would suggest you to consult a data recovery expert company. Also don't tamper with your hard drive because it will make bring permanent data loss situation.
Physical hard drive failure situation should be handled by professionals in a controlled environment of class 100 clean room labs.