I underwent rhinoplasty more than 2 years ago that partially corrected crooked nose, reduced dorsal hump, and treated bulbous nasal tip. Nose is still deviated , there is palpable and visual presence of left ala rim graft, retraction of right ala rim, & straight contour of nasal dorsum. My surgeon is willing to revise it for free, but refuses to offer guarantees or show confidence due to presence of scar tissue, thick skin, resorption, complication of fixing crooked nose. What should I do?