Dear user, there are 4 options in our knowledge, as far as skin whitening treatments are concerned, and they are as follows:
Chemical peel (Rs. 1,800-5,500): in this treatment a solution consisting of alpha-hydroxy acid will be applied on your skin, which will exfoliate the damaged upper layers and combat the melanin content, so as to reveal healthy tissue beneath. This concentration can be light, medium or deep, and will work effectively on blemishes, dark spots and uneven skin tone.
Laser (Rs. 4,000-30,000): This procedure will use an intense light beam to minimize melanin content within your skin. Thus leaving your skin healthier and brighter than before, it will help you overcome tanning and dark spots.
Injections (Rs. 6,000-40,000): can detoxify the body, protect you from harmful UV rays and enhance skin tone. It will use a dosage of glutathione however, which can be unsafe and have severe side effects as well.
Skin lightening products (Rs. 200-20,000: This option will provide you with a wide range of creams that have bleaching properties. These may not deliver long lasting results but may work with regular application. 
You are required to approach a dermatologist to avail above treatments, you can refer from our list of dermatologists in India to get more information.