First let me say that I don't think the surgeon should have done a different procedure unless it was necessary. But I had a lower body lift and lipo a year ago, which got rid of all of the loose skin and fat on my lower abdomen. For me, just a tummy tuck would not have done the job as I still would have had "love handles" and loose skin on the lower sides, etc. I still have some, but probably could use an upper body lift. I'm just throwing this out there as I don't know if u had extra skin on other parts of your abdomen or not. Maybe the body lift would have been a better procedure for u.
You should sue him and make him redo your surgery for free. That was not what was agreed upon before surgery. You have rights...exercise them!!