Side effects from scar treatment at a dermatology clinic

The clinic has sent a lawyer's email saying they will sue me. My skin has been ruined, I can't keep up with social life, and I'm living in despair day by day. The director just says, refund and done. They threaten me not to write about it online. If I get a refund, does that mean everything is over? Is the meaning just, take the money and live with the side effects and scars forever? Seriously shameless and infuriating. When I confronted them about how the side effects left me with even more scarring and asked how I’m supposed to live now, they dodged it by saying that was not their problem. Is that really how they want to make money by throwing away their conscience? I have a recording. Don’t deny it. In any case, when I die, it’s over. I don’t care whether I get sued or whether a criminal record gets added, and I have nothing to lose. I was that sincere about my skin, and you ruined it. I can spend the rest of my life desperately fighting back with the media, by making videos for YouTube, and then end my life, or otherwise I probably can’t do social life with this skin anyway, so maybe it would be better to live in prison forever. Indented scars are hard to fix already, and there are so many people who invest ten million or twenty million won and still see no change, so why did you end up making even more scars? Now I just have ruined skin, no will to live, and I feel disgusted. After the second session of combination treatment, a scar that definitely had not been there appeared, so I went in person to show them and ask about it, but they just kept repeating that it couldn’t have appeared. Would a scar that wasn’t there just appear on its own? I have hundreds of photos in my album from before the procedure, and no matter how I compare them, it is clearly a side effect, but the director who only glanced at my skin from far away is always right? Would the director, with good skin, even know how depressed and desperate I feel because of this scar? They probably just want to build their career and make money. They don’t know anything about the feelings of acne scar patients, not a thing. I still remember their attitude and expression when I said my skin had gotten worse. On top of that, every time I went in for a procedure I worried it might cause side effects, so before each session I even booked a consultation with the director and kept begging them to please take good care of me. Now I can never trust dermatologists again. They said if I did ten sessions, it would improve by 90 percent, but I did five sessions and it got worse, so what 90 percent are they talking about... Seriously, their conscience is dead. I hope everything they do fails, and I curse them to ruin for generations.