Bad Botox changed my face shape? (Photo)

My face has gone from heart to oblong. The only change was a new Botox injector. I could tell he injected too superficially & my smile also changed (hard to smile wide). It’s been 6mths now. Is my face oblong because my jaw muscle has grown back or because of his bad injection? How do I get it back to heart? It still looks slim everywhere & im worried more Botox will make it look even more oblong