Tell me the way to use chemical product for fix my skin barrier??

I think it's best to focus on hydrating and soothing products first in order to recover your skin barrier. Ingredients like ceramides, panthenol, centella, azulene and etc will help. I've tagged some affordable kbeauty options with these ingredients

I cannot understand from the language of your post if you are still using that product with mercury or not, but if you are, please stop immediately. Mercury is a toxic element that SHOULD NOT in any way be present in skincare products that you put on your SKIN. It can cause a hell lot of damage and health problems. Stay away from it and from any brand that has it in their products. Those brands cannot be trusted with something as important and fragile as your skin. If you don't believe me, please, look up 'topical mercury'.

hi there! I would let my skin rest for a week and use during that time oat masks for healing, double cleansing and moisturizer/spf. Then introduce slowly a toner or essence. There are essences alike the one below that contain ferments which regulate the sebum production of the skin. Afterwards introduce a salicylic acid serum AHA/BHA, recommend the one below because it is not to harsh to start with. SINCE YOU HAVE OILY SKIN, a lighter moisturizer EVENINGS a lighter SPF mornings. Give your skin time to heal.

use this as your first step to recover your face from the mercury..focus on your skin barrier first and after your face became healthy you can add the acne serum to get ride your acne or acne scars