Hi BatuhanKavlak,
To start, retaking a CAT that you've already taken is NOT a realistic way to assess your skills. Seeing even a few 'repeat' questions can 'throw off' the Scoring Algorithm and impact your pacing, energy levels, fatigue, etc. (meaning that they would likely all be better than they normally would be). This 710 CAT score result is considerably higher than your other results - AND it's from a CAT that you took before - so unfortunately we cannot assume that that result is accurate.
If your Test Date is next week, then there likely is not much that you can do in such a short timeframe to significant improve your Scores. With a longer study timeframe though, then you could potentially improve a great deal. If your Exam is MORE than seven 24-hour days away, then you might consider paying the rescheduling fee to push back your Test Day (so that you can continue to study and hone your skills).
1) What is your exact Test Date?
2) What were the Quant and Verbal Scaled Scores for EACH of your CATs?
3) When are you planning to apply to Business School?
4) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich