It might have been salicylic acid peels, and they burn, at least the 20% ones LOL. I do weekly lactic / salicylic peels and it really helps my skin. If you had them done once a week for 4-6 weeks and you didn't notice any improvement then go for something else. By that time your skin should have been clearing up.
Some use vitamin A acid creams with good results. It takes a few weeks or months for your skin to get used to them, and might not be the ideal thing to test and try too many things right now. You have three months and then results have to be optimal. There are several here on the forum that has solved acne problems with "retinols" and they can give you more detailed info.
I like
these juices from Beutelsbacher, but I'm in Norway and here are mostly German brands in the organic range.