Striped Print Three-Quarter Sleeve Shirt

I just received and I am very disappointed. The shirt does not look like the picture. It is made from poliester which I am highly allergic to! I would like to send it back and have my full refund. I can not find a way to do it, no address or a link to have a paid label. How can you help?

I thought it was a cotton , but like the silk, the collar is floppy but I cut startch it up or sew collar edge to resemble a high collar line. Love the colours.

Not thru to size, gave away. You need to order at least twice your size for it to fit