Scrape 12k reviews from amazon

I need all 5-star customer reviews (about 12k) scraped from a specific Amazon product page and delivered as clean, numbered CSV files in batches of 400 reviews each. batch_number — Which batch this row belongs to (1, 2, 3…) review_number — Sequential number of the review overall (1 through 20,000) reviewer_name review_title — The short headline of the review review_body — The full text of the review (no truncating — full text only) Each CSV must open cleanly in Excel or Google Sheets with no broken formatting