Hi.
Welcome to HEALTHCARE MAGIC.
I have gone through your query and can understand your concerns..
As per your complain pimples or 
Acne Vulgaris can occur commonly due to conditions like Oily skin, clogged pores, bacterial infection, inflammation etc..
As there is relapse you can start washing your face with 
Salicylic acid containing facewash..
You can restart applying Faceclin gel containing 
Clindamycin and Niaconamide..
You shouldix 
Benzoyl Peroxide gel along with Faceclin and apply twice a day..
Glyco6 cream containing 
Glycolic acid should be continued..
For dark spots apply creams/ ointments containing Kojic Acid, Glycolic acid and arbutin..
Azelic acid preparation will also help..
You can also apply Vitamin E gel at night..
Scrub your face twice a week with a face scrub..
Limit sun exposure and always apply sunscreen lotion..
Do cool compresses over face..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.