Halo laser for acne scars - how do I make sure my provider is performing a deep treatment not just surface exfoliation?

I pre-paid for 3 Halo laser treatments. I had my first 2 weeks ago & had no swelling but lots of exfoliation. My provider didn't want to go too intense with treatment, but they are costly & I want results for my acne scars & collagen production. She didn't explain much about the different levels when I asked either or confirm how deep she went. Can my results still be good without swelling? Otherwise, how do I ensure my provider performs a deeper treatment to target scars/collagen production?