GMAT V25

Hi All,
Just finished my GMAT exam and it couldn't worse with a V25.

I have a maximum of one month to take it to consistent V35+ to reach my target. Would anyone here suggest an interactive course/online classroom lessons for improving verbal from 25 to 35 within a month.

A brief of my prep:
focused on verbal - finished EGMAT sentence correction. While the course is very good and detailed and I took enough time to complete it, I found my confidence in verbal was very low. The exam pressure also matters. However, exam pressure was the case for Quant too.

I have scored 660, 630, 650, 690 is 4 GMATprep (no repeat) - Q were consistently 49/50 but V was fluctuating. Which means I collapse in verbal during exam and I couldn't judge what's going on.

I am a non-native speaker and can dedicate enough time.

Any suggestions for an interactive or online classroom course which can help me from V25 to V35+ to reach the 700 level in GMAT.

Thanks,
Sadek