Can anyone guide me on what to do when a company has not issued an appointment letter and only sent an email for the offer letter? I worked with the company for two and a half months, and they credited my salary into my bank for two months. After I resigned, they now refuse to pay me for the 7 days I worked, claiming I have to give them one month's notice. However, I believe I should be paid because I have not signed any document where this notice period was mentioned, such as an appointment letter. I have all conversations in my personal email, which they corresponded to me from a professional email, and I also had my own professional email ID. Please suggest what I should do.