How to Remove Scar if Unsure Whether It's Infected or Not?

I attempted to remove a mole with a Wart and Mole Vanish cream bought off the Internet. However, mole removal was not successful and I am now left with an ugly, red, mole-like scar. I am unsure as to what it is. I went to see a plastic surgeon and he suggested it was a hypertrophic scar. What can I do to remove this scar? Could it be it infected? I've had it for nearly a year without any problem. Thanks.