I know that but you could be using the wrong / as there are 2 located on the keyboard.
Best thing to do is to reset your controls to the normal Arma 3 preset in your settings
Could you please provide a time of when this occurred?
Also, from what I can see on the photo I can see the gear listed above. Would you be able to state what rebel clothing you were wearing and the attachments of your weapon?
Just a tip, holding collective makes you spin more. If you want to recover from the spin quicker just tap W once for around a second and let the helicopter speed up by itself. This will make you escape a lot easier.