590 to 570 target is 680

Here's a radical approach to improving your score.

Since your quant score suggests that you are in 47-48 range, forget studying for Q any further. For your target score, 47-48 is enough.

Now, do only verbal problems and study the very basics. Verbal range in 22-23 suggests that you need to go back to the fundamentals.

Take a diagnostics test on verbal and find out which area you are weak in. If you are weak in all 3 areas, start with SC, and then CR.

Don't just do the problems, but read the explanation and don't move on until you understand why you got the question right AND wrong.

Hey nink,
ya can u tell me when u said about the basics and fundamentals
what should i be concentrating on ..my CR is good SC I followed manhattan , may be a problem with RC definitely

I dont think problem in one area (RC as u suggest) will result in V22-23. usually, verbal score is low if one has specific habits that he/she just can't get rid of and applies that same grammar to GMAT verbal section.

If you have MGMAt book, you can get free CAT exams from MGMAT. Their CAt exams give you diagnostic results, explaining which area you are weak in and it will tell you that you are consistently getting wrong answer in certain level. (500-660, 600-700)

Just because you are good in advanced level questions, it doesnt mean you will be good in easier level questions. After all, you will never see advanced level (700-800) questions if you can't get lower level questions right consistently.