However, it's important to clarify: It is a listening exam simulation containing recordings, questions (multiple choice, map labeling, form completion, etc.), and an answer sheet. An essay is part of the IELTS Writing tasks (Task 2 in General/Academic), not the Listening test.
I understand you're looking for an essay related to "Road to IELTS Listening Test 7" — likely the listening section of the seventh practice test from the Road to IELTS preparation course. road to ielts listening test 7