Thank you for your question. Yes, another doctor can easily dissolve any remaining filler you might have. I recommend scheduling a consultation with an experienced, board-certified facial plastic surgeon who can perform an examination to determine where the lingering filler might be and then...
Your folds can be easily treated with dermal fillers, particularly RHA as it will help preserve the movement around your mouth while smoothing it out. I've also successfully treated younger patients with PDO threads, but you would need to be evaluated in person in order to determine if that...
Facial sculpting and contouring can be created with well-placed fillers (Voluma, Countour, Radiesse, Bellafill) and Sculptra, which would give improvement in facial balance. Fat or implants are alternatives. I recommend getting a formal evaluation with a facial sculpting expert. Best, Dr. Emer