Big boo boo on reinstalling OS X Lion. Help!
Probably the best thing would be if you have access to another Mac. (if you don't...  well...)

If you do, download the Mavericks installer from the Apple Store but when it automatically launches QUIT out of the installer.

Download Lion Diskmaker (now Disk Maker X) from here:

http://liondiskmaker.com/

This will then make a bootable Mavericks installer to an 8GB or larger flash drive from that Mavericks installer application.

Then just boot from the flash drive and you can install Mavericks.