Macbook pro wont start up and stuck on a restart screen, after mountain lion installtion failure

I tried installing Mountain Lion on my Macbook Pro and the installation failed because my "hardrive was damage and could not be repaired" it then told me to restart my computer and try again which i did. However i am unable to even get back to my desktop because the Macbook starts up and i get the grey Apple logo and then this screen appears:
Instructing me to restart my computer, it has been stuck on this cycle for a few days now and i have no idea how to fix it.
Any help would be much appreciated
StephBeard

StephBeard,
if you still have your MacBook Pro’s original box, it can be found on one of the stickers on the box. If you don’t still have its box, it can be determined from your MacBook Pro’s serial number. If its serial number has eleven characters, write down the last three characters; if it has twelve characters, write down the last four. If you don’t have its box, please include in your reply those last three or four characters of its serial number.

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Macbook pro wont start up and stuck on a restart screen, after mountain lion installtion failure

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