Hello respected, I can understand your concern, i think you should go for salysilic acid peeling, have at least 5 to 6 sittings, topical tretinoin 0.025% cream once at night, benzoyl peroxide 2.5% gel in morning , both for half hour than wash off, oral antibiotics like azithromycin or clarithomycin , And a good quality moisturizer (cetaphil cream)bed time and after bath. Once your face is clear you can continue Tretinoin cream for maintaining the result. I would have prefer isotretinoin( in high dose 40mg than taper the dose and for at least 4 to 6 months to get best result) but as you have taken twice in last few years,I would suggest you to go for peel do get prescribed the medicines by a dermatologist, pimples also gets aggravated by stress, hot and humid environment, too much junk foods, excessive use of cosmetics. So keep in mind those things thank you