S.W.
I just recently go some transfers from Walmart and it took a bit to get them right. Do use a hot iron but have a cloth or paper towel between the iron and the fabric. Put some weight like pressing and counting to 10 or something to let the glue melt. And then iron it on the other side as it says and that will make it stick better.
Good luck and patience and it will work.
The other S.