Boot camp major issue

So I'm doing a windows 7 partition on my Mac. However during the win 7 installation I got an error saying "no bootable device blah blah".

Now I know how to solve the issue. Reboot and hold down the options key to select driver.

My issue: I don't have a Mac keyboard and I hold down the alt button and it doesn't work. I hold down ctrl + R and nothing works. My keyboard is a pc one.

So basically I'm fucked since every time I reboot it sends me back to the black screen that says "no bootable" driver and there's nothing I can do.

I could buy a new keyboard but I wouldn't be able to connect it since it's stuck on the "no bootable driver" screen

Please help.