Can I correct my asymmetrical lip to normal after an accident? (Photos)

There is 2 inch stitch inside my upper lip which was done in September 2015, now even after 4 year the swelling is not reduced & there is large flesh like lump created at the centre of the lip, there is no flesh in right side when I smile and you can see 3rd molar & 2nd molar. My lips both upper and lower are tilted from right to left of face. What is the best possible solution?