If you cannot access the official download right away, you can use these public alternatives for practice:
✅ Write down what you hear to improve listening accuracy. Cambridge English Advanced 3 Audio Download
: For those who prefer physical media or older setups, Audio CDs (containing the materials for all four tests) are available for separate purchase. What’s Included in the Download? If you cannot access the official download right
When you purchase a new copy of Cambridge English Advanced 3 Student's Book with Answers , look inside the front cover. There should be a unique access code printed on a card or a scratch-off panel. When you purchase a new copy of Cambridge
It includes all four parts of the Listening paper for each of the four tests, featuring various accents and speeds consistent with official standards.
Since you also asked to "create an essay," here is a sample C1-level essay on the importance of using official practice materials like those found in the Cambridge Advanced series.