Skin Whitening. For skin wightening.

Hi, I have been using Aromapearl skin whitening night cream since my 9th class.After using that my skin tan and pigmentation are all gone and my skin tone got little lighter but when I stopped using it I got small pimples all over my face and I got even more darker than my original skin tone.I consulted a dermatologist for pimples and used the prescription it's all gone and then I got desperate and started using this cream again to lighten my skin it's been 5 years I started using that cream now I'm getting pimples again no matter what I use they kept coming I thought my skin barrier is damaged and I'm not sure it is because of that cream or my lifestyle changes. These are ingredients of that cream Vitamin B3, B5, Vegetable squalene, Vitamin C, olive Oil, Kesar EXT & Shnak Bhasm. If this cream is reason for my pimples and damaged skin I want to stop it without affecting my skin and achieve healthier skin.I want to know is there any safe alternative for skin wightening.