Lawn Help - Baton Rouge

I need some help getting my grass to start growing. The house/grass is only three years old. It's centipede.

Since the first day it was planted, it has never really taken off. It will turn a brownish-green during the growing months, but has never filled out and just isn't a pretty lawn.

I've done a soil sample and it came back at a high ph. As instructed by LSU, I've applied Sulfur quarterly for the last 18 months. I've also fertilized.

I know it's early in the growing season, but I can already tell my grass isn't going to be as pretty as some of my neighbors.

Is there any recommendations for a company/individual that can come take a look and make recommendations as to what I need to do? Not looking for someone to cut my grass, just need someone to make it grow.

Thanks!