It was really disappointing... that I can't even wear a bikini to go for a swim cause I have to hide my scar below my buttocks.. please help... :(if is there any simple solution I could do.. that I won't be spending too much

If lightening cream are not helping, maybe you should try a peel; like glycolic acid or TCA... If you're doing it at home, always start with a low % and moving up until all the scars are gone... You should also exfoliate regularly thereafter...