The first thing I would do is stop studying specifically for the GMAT and start reading as much as you can.
Find some good novels and well written books. I believe there are many suggestions on this site somewhere. I really believe the reason I was able to improve from a 34 in verbal to a 45 is because of all the reading and writing I was able to do in the 2 years between my exams. Keep reading everything you can get your hands on.
Also, be diligent when writing and speaking. If you don't know the proper way to phrase a thought, ask for help or look it up. Don't just make something up. For example, look at your post. It's filled with mistakes. Don't settle for imperfect writing or speech.
After a couple of years learning the language, come back to studying for the GMAT and I guarantee you'll score higher than a 13 on verbal.
It's going to take a lot of time, but it can be done. Imagine the compelling b-school essay it would make if you went from a 13 to a 40! Good luck.