Is a scar revision possible? (Photo)

After I had my surgery I noticed I was very uneven at my pelvic line. One side I was incredibly tight, whereas the other not so much, maybe even not tight enough. The ultimate result was the side that had too much tension opened. No infections, just wouldn't hold. I'm left with an uneven abdomen, and a scar. What can be done, and what ballpark would I be expecting cost wise?