Phone screen cracked so cannot access the control center to unlock screen rotate

Does anyone know an alternative way to unlock my screen rotate lock other than via the control centre?

My Iphone 6 screen is cracked and the bottom 20% doesn't work so I cannot use the message keyboard, so I want to be able to rotate my screen to use the keyboard in landscape mode, but because the bottom of the screen isn't responding, I cannot swipe up and access the control center, and turn off screen rotate lock.

Any ideas?