Can you please share a photo? Sometimes acne mark will require creams which are only available by prescription. For now, you can use a cream called Melaglow Rich at night. In the morning use UVDoux 30SPF sunscreen.
Next Steps
Also use Ethiglo Facewash.
Health Tips
If you are still developing acne then consult a dermatologist near you or do online consultation. if the marks improve with this then continue for 1-2 months, otherwise consult for a stronger prescription cream.