GMAT Verbal Section | Re: Scored only Q49 V21 after 2 months of hard work

Hi,
I have started my prep 3 months back(2 weeks break in between.
Gmat Prep-01 Q46 V17 Jan'16
Gmat Prep 01 Q47 V19 Feb'16
Gmat Prep-02 Q49 V21 31st Mar'16

I have completed quant from Mahattam prep guides and Verbal from SC grail.
Took additional help on Verbal from Jamboree (3 class)
I did all the OG questions timed/untimed to speed up and understand.

I need opinion and help on how must i improve my Verbal score.

Thanks