Should I ask my doctor for a higher strength peel treatment for PIH spot on leg? (Photo)

Hello, I’ve been undergoing sessions of glycolic peel on a small but very pigmented spot on my leg, and a few on my lower back. My doctor is using a “light peel” and after 3 sessions, I’m seeing no peeing and no results. I’ve also been using Tri-Luma cream and it did little to nothing. My spot is old, about 12 years old, caused by an insect bite. Should I ask my doctor for a higher strength peel? I’m paying $200 a session and am frustrated by the no results. He also doesn’t communicate. Thanks.