Inktastic My Auntie Loves Me Dinosaur Youth T-Shirt

Since my oldest great nephew lives a few hours away and other three great nephews and great niece live here I wanted to get them to the same tshirt from me. I found the 4 local kids theirs from one place for a total of less that $13. I looked for the 10/12 everywhere I could think of. After feeling the time crunch I finally decided to spend more for this one shirt so the oldest didn't feel left out. I read everything and looked over the size chart meticulously to NOT have anything negative happen. Walmart size chart said a 10/12 is a size youth large so that's what I ordered. Well, I got this tshirt on the 27th and it was a size youth large BUT apparently the company that actually makes the shirts has a youth large as a size 14/16!! So not only do I still not have a size 10/12 youth large that I paid a lot more for BUT I also havent been able to get the app return to go through. I haven't been able to attemp to go into the store to see about returning the shirt. I also wrote the supplier right away and haven't heard from them. I am giving them a bit more time though since we just had the weekend and maybe they dont work weekends.