CIBIL is one of the four authorized credit bureaus in India which provide a credit score, the others being Equifax, Experian and CRIF High Mark.
The only way you can ensure that you are not rejected for a loan/card is by improving your CIBIL credit score to 750 or above to show that you are a responsible borrower who pays off debt obligations on time. You can use the tips given above to improve your score and demonstrate that you are a financially responsible borrower. It can take 4-12 months to improve your score, depending on your individual credit situation, but the reward of having a good score, technically means a lifetime of quick and easy access to credit.