Getting your credit score to rise can take some time.
What you need to do is keep making timely payments on any debt you owe. Try not to let any loans or other debt go into default.
Once you pay off a loan or other debt and the debt is settled then your score should go up a few points when the loan company or other debt you have marks your loan or other debt as paid off.
There's no quick way to get a high credit score. It takes time to do so and on time payments.
Only take out debt that you know you can pay back without defaulting as taking out too much debt can hurt your credit if you're unable to pay it back.