If the drives were running when they fell, you could have done some serious damage to the media. This could make the data unrecoverable. The best chance you have of getting your data back is through data recovery. On our support page, under warranty, you will find a list of our data recovery partners in your region.
Unfortunately, this is the very reason why you never commit your valuable data to just one drive. For my most valuable data, I either copy it to multiple drives, or burn it to DVD’s. In some cases, I do both.