Your are in a very tough position. It is probably too late to take the GMAT over again and submit a strong application. Honestly, unless you are 50% done with your application it's probably too late to complete strong applications in general.
If you are eager to get into a b-school during this application season, you might want to set your sights lower than top 10 schools. At this point, it sounds like you will have a tough time getting in.