ankle deformity?

can anyone tell me why my entire left ankle / foot look like this? I've had cerebral palsy for now 23 years and this is the side that's effected from dystonia and spasisty as well. i have an extremely hard time walking around the house without shoes on bc of obviously ur foot and ankle aren't supposed to be sideways. when I stand up also my foot goes outward which pulls on all my ankle ligaments on the inside. is there a way for me to stop this from getting worse and realign my foot?