letter requesting a promotion

One page letter requesting a promotion, aka being hired for a manager position that just opened. The letter must be wrote about your customer service experience in a large company like Walmart or Amazon. You have worked for the company for a short times a customer analyst handling major business accounts, and have won many rewards in your current position. Your skills has saved the company over 1 million dollars and brought new ideas the company has put in place for all other customer service personnel. Education wise, you have a Bachelors and masters degree in psychology which helps you when it comes to customer service.There are many articles online that show how using psychology helps with the customers experience. Use articles or information to justify this promotion and asking for a salary of over 100000. Must provide information and ideas on what you could do to assist in the customer experience dealing with the company.