The hope is not over.
There is lot you can do.
If you using windows, there lot’s of problems being using that.
If you are knowing how to use your comporter with another OS, you should try:
To write usb flash stick with some Linux Live cd.
Then booting this up and then download netinstall for linux and try that.
In the best worlds even Mikrotik should provide a ISO file, with like say Bootable Alpine Linux with the latest netinstall.
My self struggling a lot, to get netinstall to work in linux, because of I setting the device to boot via dhcp instead of bootp.
You can read about my journey here and how i solved the problem:
http://forum.mikrotik.com/t/trying-to-unbrick-my-rg750gl/165209/1