The lettering is way toooo dense for the fabric. The other way to explain it, is too thick. If you agreed when it was shown, not much you can do about it. For quilting always try to keep the embroidery light and airy. Somewhat like red work. Sometimes it is hard to get a customer to understand what they picture in their minds isn't always what is best for the fabric. Could you try to press it with a damp cloth to moisten it and then ever so slightly pull in different directions to smooth it out, pin in place until it is dry? Sometimes we do this to square a block to the corret size? If it is a wall hanging that might work for you.
Good Luck
Suzy