at that point the best way to try and recover the router is to Crash the router out right..
remove the power cord, hold down the reset button, without letting go of the reset button put the power cord back in the router, continue to hold the reset button for 20 sec. If you did this correctly you will need to set a static IP on your PC of
IP:192.168.0.99
Subnet: 255.255.255.0
Default:192.168.0.1
you should then be able to log into the router and immediately see the firmware upgrade page. flash it with the correct firmware and you should be up and running.
**Note** disconnect all ethernet cables from the router before attempting to crash.