I am sorry to hear of your situation. It sounds as though you did not have a good operation. I agree that you should seek a second opinion.
A scar revision may be possible but I would need photos or an exam to be sure.
The extra fat can be removed but you will need skin tightening as well.
I use Slimlipo laser assisted liposuction (see pic below). The laser tightens the skin as well as dissolving the fat which is then aspirated. in my experience the laser lipo leaves smoother skin following liposuction.
See before and after photos of Slim Lipo and Mini Tummy Tuck.