I designed a logo for a client almost a year ago for his tshirt business. Since doing this I didn't think the logo would be used on the tshirt for anything other then a label. But it seems the logo is printed right across the front of these basic tshirt and is the main selling point, think hype clothing. The clients asked me to change the colour of the logo a few times or tweak it to which he has paid me for but then he's gone and put this on tshirt a to sell. He's paid me for the logo but he's putting the logo on tshirt sand passing it off as his own tshirt design range. Basically he's buying tshirt a from a wholesale and slapping my logo on and making a profit. He's now asked me to design a pattern spot go behind the logo and I can't help but feel that he's going to pay me £20 for this small amendment and then make a killing in profit selling it. I'm at a loss as to what to do and need some advice.