Hi
You didn't mention what your diet or skincare routine were like but in order for you to achieve some level of improvement, you will need to address these two factors and consider taking some additional supplements to control your acne.
1. Improve Your Diet
Increasing water intake is important. In addition to staying hydrated, there are some foods that should be included in your diet e.g. those containing omega 3's and 6's. They are also available as supplements. They will help dryness and reduce inflammation of any spots. Have more fruit and veg. The water content in these as well as the vitamin C and antioxidants will help.
2. Improve Your Skincare regimen
The key thing about improving your skincare is that:
1. You need to be committed to a routine
2. You need to apply quality products in the right order
3. The products you use need to be suited to your skin which you describe as oily
4. The products you use should "compliment" each other i.e. in terms of their formulation
If I were to recommend a routine for what you describe, it would be something like this:
Pre-Cleanser:
(I'm not sure if you are male or female so this may be an unnecessary step!) This is an oil based product which helps to dissolve makeup or sunscreen. Not necessary step if makeup/sunscreen not worn
Cleanser: Should be pH balanced. Purpose is to remove dirt / debris etc. Helps unblock pores. Must be done 2x daily.
Toner: Use toner containing AHAs (alpha hydroxy acids) e.g. salicylic acid (suitable for oily/combination skin) - this removes dirt and unclogs pores. AHA's cause gentle chemical exfoliation which helps to unblock pores. This is better than the exfoliation caused by abrasive facial scrubs.
Topical gel: Apply salicylic acid gel to the affected part - helps unclog pores, is anti-inflammatory, it's calming and reduces chance of scarring. Alternatively benzoyl peroxide can be used directly on the affected part as it has anti-bacterial properties.
(Please note that benzoyl peroxide can be very drying for the first few days of use) Moisturiser: Apply moisturiser which contains vitamin A to the entire face - vitamin A helps to normalise, repair the skin, stimulates collagen to be produced therefore reduces scar severity (ensure you also apply sunscreen during the day when using creams which contain vitamin A)
I have also written a blog post on overhauling your skincare routine - you may find this useful too:
https://www.madameskin.com/blogs/madame-skin-blog/121656385-is-it-time-to-overhaul-your-skincare-routine3. Take Supplements
As mentioned above, omega 3 and 6 fish oil caps help to reduce inflammation and are good for dryness.
I hope this was useful.
Feel free to ask for further advice
Liz