Hi
divas987, I can totally understand your feelings as I was in your situation a while ago. If you feel that you are stuck, you should (and possibly need to) change your approach / materials. The good news is that you have a big room for improvement in both Quant and Verbal sections.
Also, you seem to consistently score around 600, meaning that you are not suffering from massive test score variance.
Verbal is quite tricky, there could be a multitude of reasons why you are not getting a higher score. As far as free / affordable resources go - follow
generis and SC Butler to work on your SC skills. For RC and CR, have a look at guides from
nightblade354 and
GMATNinja. Honestly, this is all you need. Another great resource is a library of videos from Ron Purewal (search for a thread by @carcass).
It is probably easier to improve Quant ability in a relatively short term. People on this forum speak highly of the
TargetTestPrep course, but bear in mind that you need to invest a lot of time into the course. I have heard that it takes around 200 hours to complete the curriculum. Alternatively, you may want to reach out to
IanStewart, who is a Quant aficionado. He has very well written Quant books and he also offers tutoring. Ian helped me tremendously with Quant in about a month.
Let me know if you have questions. Good luck with your prep!