You should not use a low-level format to your HDD. Comparing with the full format and quick format, the low level format is really harmful to your physical drive. So, you should learn a lesson not to do it again.
That pretty much sums it up right there. Many years ago it was safe and in some cases needed to low level format a HDD. There was even an option in the bios to perform it. But not any more and in most cases will render the drive completely useless as you have found out. A real low level format is something that is done by the manufacture and should never be needed again.