missing part of my bettas tale and he wont eat

Question
My betta won't eat I don't him to die and ths gos with the email to Racle from the US

Answer
How old is the betta?  Is there another fish in the tank with him? What size tank is he in?  Is the water filtered and heated?  What are your ammonia, nitrite and nitrate readings?  These are things I must know before I can answer any of your questions.