Hi Abdelazim,
The best advice I can give is to sign up for our full course. A band score of 4.5 can be greatly improved upon with some study and good study materials. Our full course, along with our HD videos, practice tests, and student workbook will have your score improved very soon!
There is a link at the bottom of this page, but you can go directly here to sign up: https://www.aehelp.com/full-course/?s2-ssl=yes
