Hi hsin281,
To start, to score at a high level on the GMAT, you have to have a variety of skills (more than just content knowledge) and the only way to properly assess whether you have those skills or not is to take FULL-LENGTH CATs under realistic conditions AND at regular intervals. Going forward, you should plan to take a FULL CAT (in a manner that matches-up with what you will face when you take the Official GMAT) every 1-2 weeks. The process of taking (and reviewing) a CAT requires a significant amount of energy and effort though - and takes time to 'recover' from. This is one of the reasons why you typically should not take more than 1 CAT per week though.
Statistically-speaking, raising a 500 to the point that you can consistently score 700+ will likely require at least another 3 months of consistent, guided study - and you will have to make significant improvements to how you handle BOTH the Quant and Verbal sections. Thankfully, the GMAT is a consistent, predictable Exam, so you CAN train to score at a higher level. While I understand that you probably really want to take the GMAT in 1 month, if you ultimately "need" a 700+ to apply, then THAT Score Goal has to come first - and you might want to consider pushing back your Test Date and adjusting your application plans.
Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
1) How many hours do you typically study each week?
2) Have you used any other study materials besides the two courses that you mentioned?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich