I think it was a good 18 months before the pink on mine faded. My first pacemaker scar was big and ugly, but when they swapped out the pacemaker for the defibrillator, it healed up quickly and thin. Go figure.
You might give this one a while longer, and if it bugs you see a dermatologist about steroid injections or other ways to reduce it.
Have you used the OTC stuff like mederma?