Complications happen. They happen often enough that there are entire TV series on botched cosmetic surgery. Most of them aren't even a result of the surgeon fucking up.
I'll note I'm not saying the characterization of the surgery as "botched" is necessarily true, just because it didn't have a good result. There are inch-thick piles of waivers and other shit you have to sign before any procedure of this sort.
Still, if they are botched, malpractice is a thing. When medical care falls below an objectively professional standard, that's actionable. This is why malpractice premiums get so high. Doctors and lawyers both pay through the nose for coverage for this, and that's even if they've never fucked up. Once they do fuck up, or even show signs of possibly fucking up in the future, it goes through the roof.
Professionals are held to a professional standard, not a normal person standard.
This is both good and bad, if you happen to be one of those professionals. It's bad, in the sense that you're held to a higher standard than ordinary people when you're sued. It's good, in the sense that anyone wanting to sue you for falling below a professional standard has to dredge up a professional in the same field as you to testify, as a professional in that field, that you fell below that standard.
Guess how popular doctors are who routinely testify against other doctors? If you guessed "not very" you'd be right. Doctors are often reluctant to testify against each other. So if you want to get a malpractice case started, the law firm probably taking it on contingency, if you're not a millionaire who can pay six figures up front, has to hire one of these medical experts to testify, and those guys also want their money up front, so any law firm taking it on contingency to the point they'll front expenses for this has to be pretty sure they're going to win.
Still, if Rani actually got a botch job, I hope she considers a malpractice suit.
If it's just unsatisfactory for reasons that have nothing to do with the competence of the doctor, suck it up, I guess, but only an expert could really say whether that's the case.