What treatment should I follow? To what extent is it curable? (Photo)

Facial esthetic has been changed.front teeths are not seen when i do smile..some lower teeths protruded,as therefore an upward push to my lower muscles that makes the chin look backward..there has been a major problem in bite..to bite properly I have to move my lower jaw backwards.this is the ist photo i will post,rest pics are of jaw position when I close my mouth.sufficient air not passes through left nasal vent .what treatment i should follow ..please tell me in details..

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