Retake IELTS. Its much much better than getting your application rejected. Your standard of speaking, writing and reading is not going to change. so u will get the same band or better for thse three. And as far as listening is concerned , u can work harder. After my IELTS test I felt if i had concentrated better I cld hve performed better for listening. My score was 7.5 for listening. So pls give IELTS again.
Mayb u will b able to score better now tht u know how the test is conducted. Best of luck. IELTS points is in your hands , u jst need to work on it.