Keyboard layout for sk621

Hi everyone!

I recently bought the cooler master sk621 keyboard.

The problem is I’m not able to use some keys as the shortcuts do not work with this keyboard, for example the forward slash and open curly bracket are both in the f7 key. Shift plus f7 gives me de forward slash but ctr+shit+f7 gives me nothing (and it should give me the open curly bracket).

I’ve tried a bunch of keyboard layouts with no success.

Anyone had this problem or know how I can get it to work?

Thank you all in advance!