I can't wipe my hard drive in OS X install page

So, I've been having trouble with my 2011 Macbook and backed up all of my files because the hard drive was failing. I got a new hard drive and reinstalled Snow Leopard to get the laptop up and running, but once I started transferring files over, it froze, so I rebooted it and got stuck in the OS X Maverick install window because that's what started my previous incident. So, I'm back to square one.
I have my files backed up, so all I want to do is wipe my hard drive completely and reinstall Snow Leopard again, but my hard drive will not erase in Disk Utility, or when I ask for a repair, it will say the hard drive is ok, but I can't get out of the installer because something is actually corrupted and will not unmount, eject, or anything. I can't install OS X either, and nothing seems to be working.
Any suggestions?

You should be able to boot from your Snow Leopard CD by holding down the C key when restarting.
Run Disk Utility from the CD to erase your drive.
Install Snow Leopard then update to 10.6.8
Combo updater: Mac OS X 10.6.8 Update v.1.1 - 1.09 GB
http://support.apple.com/kb/DL1399
I suggest that you partition your drive using Disk Utility so you can install Mavericks on it's own partition. That way if there are issues you can revert to your Snow Leopard partition. Make the Snow Leopard partition small. You only need a bit of free space to use the drive as a boot drive.
Move your data over to Mavericks. I would be very careful about moving your data over.
Once you are happy with your Mavericks install, you can decide if you want to keep the Snow Leopard partition.

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To check the model number hold down the option/alt key, go to the Apple menu and select System Information.
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Computer Compatibility - Lion                       Lion
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The above requested information can be found on the bottom of your computer or inside the battery compartment. Please do not include your serial number.
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Please click the white KUDOS star to show your appreciation
Frank
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Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
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OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
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You can purchase replacement discs from Apple:
Apple Store Customer Service at 1-800-676-2775 or visit online Help for more information.
To contact product and tech support: Apple - Support - Contact Apple Support.
You can purchase Snow Leopard through the Apple Store: Mac OS X 10.6 Snow Leopard - Apple Store (U.S.). The price is $19.99 plus tax. You will be sent physical media by mail after placing your order.
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if i wipe my hard drive clean can i re-download iTunes and get all my songs back and have my iTunes work like it does now ???
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Click here and follow the instructions as well as creating another backup of the iTunes Library after it's been consolidated.
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They already damaged you Mac by fooling with the BootCamp partition without knowing what they were doing. I wouldn't suggest haveing them help you do anything.
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They should have tried this at the store.

I can't wipe my hard drive in OS X install page

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