3 Mths of Dermapen, with LED Light & Peels for Old Acne Scarring (Redness, Indentation)

I had bad acne as a teenager and eventually my mother let me use roaccutane which cleared my acne up like a miracle; however the damage was already done and I had the acne scars to show it. When i was 21 I had started with skin treatments, I went in pretty uneducated thinking that microderm and peels might help lessen my scarring and I do think they improved my skin's overall smoothness, brightness and texture but as for my scarring they didn't really do every much at all.
When I was 26 I decided to give dermapen ago I bought 3 sessions to be used over 3mths, with 3 LED light and peels to be used 2 weeks after each dermapen. I had brought in all my current skin care products and asked to use only neutral ph skin care, which meant I ended up purchasing an extra $120 of serums, creams and gels.
The first session was scary but because they used numbing cream on my face 20 min before the Dermapen I didn't feel a thing, I asked my beautician to put it on the highest setting on my cheeks. After my first session the girl doing my treatment insisted I need a Post Inflammation Hydration Serum which I needed to put on after my dermapen for 3 to 5 days but then we both forgot to sell it to me. When I go home my face felt so tight and uncomfortable, borderline painful but didn't know if I was allowed to wet it and put normal moisturizer on it. After hours of umming and ahhhing I had a shower and rinsed it with just water and applied moisturizer, it was like heaven, the moisturizer kept getting absorbed very quickly and I had to keep reapplying. After the first dermapen I broke out, and had little under the surface acne, which thankfully went away, I felt like after the first dermapen session my pores were more refined but my scarring was not any better.