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.