Normally a combination of treatments will be used.

In your case, a guess would be subcision with a combination of either fractional laser or a chemical peel.

However, what's most important is you find a specialist you can trust who is very experienced specifically in acne scar removal and see what he/she says, and stay your own advocate the whole time.

Your picture is too blurry to comment. What treatment(s) have you received already? Just getting a filler done by a qualified injector will significantly improve these scars IMO. But I really need to see a better photo