Build a web scraping bot

Develop a bot to automate the following actions: 1. Go into a URL and based on a paginated product list, go one by one and extract its information. 2. Send a message to the seller by clicking on the "Contact Seller" button and pasting a default text. 3. Generate a CSV file with the results of the scrapping extraction. Will give further details of the URL via message. Will leave up to you to propose the language/platform to be used.