25% TCA peel application darkened my skin. I am skin type IV or V brown olive Indian skin. What can I do? (photos)

I had done 25% TCA peel 1.5 year back on my inner thighs and joint behind knee. After that my skin become darkener after few months I applied combination of 2% hydroquinone two times a day and kojic acid, alpha arbutin and steroid four times a day for around 2 months but my skin become red, swollen and dark so I stopped using it, I thought i may develop Ochronosis. After 1.5 year my skin is still dark. Please help what should i do?