Keep at it and keep trying. There's no reason you can't figure this out.
Personally
MGMAT beats them all, although people on this forum seem to think Veritas is pretty good too (although it's a lot more expensive). In addition to
MGMAT's Foundations of Math, I got Kaplan Verbal Foundations as a reference book in case I have trouble with something, but
MGMAT is coming out with their Verbal Foundations book in November (too late for me). Whatever the case, get yourself a good study plan and you should be fine.
These two posts deserve 1000 kudos in my opinion. GREAT place to really start:
gmat-study-plan-start-your-gmat-journey-80727.htmlbest-gmat-books-77703.htmlDon't give up and good luck!

timmyd
I'm a bit in the same boat too. I've been studying for about 4-5 months now. Took the Knewton coarse, which was good. However I cannot even seem to improve on my dismal practice test scores. I certainly don't feel ready for the real Gmat. It's hard to keep studying when you don't see yourself improving!
Best of luck with your quest!