Why did my hyper pigmentation worsen with Cosmelan 2?

I am Indian and have tried laser, other peels and creams and nothing worked. The only other cream that worked was hydroquinine but that too stopped working after a few months. I used cosmelan 2 without the mask in 2014 and pigment worsened quite a bit. Later did the peel but worsened even further, why did this happen? Can I try just the cream again?