First of all you should explain things properly and completely to make others understand what you are telling. What I came to understand from your question is that one Mr. Andrew called you 5 months back and asked your help in some drawings for his company which you did and no fee was given to you for it. What is your relation with this Andrew and his company? Why did you give him your drawing without any written agreement? Do you have any proof that you made the drawings which was given to Mr. Andrew for which he did not give you any money? Are you a freelancer to work like that?