Solution is to access Single User Mode. Then run the uninstall script.
Actually single usermode is not limited to this, it is meant to be used for some of the worst case emergency.
To go to single user mode
1) Go to grub menu
2) Select the option to boot into linux
3) Press a
4) it should shows something like this
kernel /vmlinuz-126.96.36.199-167 ro root=LABEL=/ acpi=on rhgb quietJust add "1" behind it
kernel /vmlinuz-188.8.131.52-167 ro root=LABEL=/ acpi=on rhgb quiet 15) Press enter
You should be able to access the shell as root without login. Now you can do anything to fix your problem.
This is dangerous,because you can access everything, yes everything. Enjoy!!!