hi,
you must go to a physio near to you again and take at least 15 sessions of treatment with your physio. you may need to apply ice packs over your operated region and therapeutic ultrasound can help you to decrease swelling or inflammation and along these things you need a good muscle strengthening exercises program for the muscles around your ankle.
take physio sessions and when your swelling gets finish than i can help you out for the strengthening exercises.
Take care
best regards