Forehead filler review

After getting the first round of forehead filler, I got a touch-up because one side was higher and the other side was lower, making it unbalanced. After getting the touch-up, the lower part of my forehead got higher and the higher part got lower than the lower part, + the middle of my forehead got bumpy. After looking up various information about forehead filler, it seemed like the peeling wasn't done properly when I got the filler. The hospital where I got the procedure refused to take responsibility, and I've been living with an unbalanced forehead for a year. I want to get it straightened again. ㅜㅜ Don't get it done at that place in Haeundae, Busan... Je*rin...