hello and welcome to HCM forum,
dark patches on the cheeks is a very common problem nowadays, as you stated that you have applied creams and have also undergone chemical peeling. i would like to inform you that patches take time to disappear completely , so you will have to be patient.
besides peels, we now have lasers(Q-switched, IPL) to treat pigmentation areas, they require atleast 3 sessions, they are painless and very effective.
i would recommend you should visit a dermatologist
who perform all these cosmetic procedures with lasers, continue using Kojivit, it has whitening properties and will definitely help to some extent.
Also, start taking oral antioxidants
, they have depigmentation
i wish you good health.