They do have men's clothes. It is hit and miss with the clothes in Avellaneda, like any massive place where you can buy a bunch of inexpensive clothes, you have to pick through some boring stuff to find the good stuff!
My boyfriend got some nice inexpensive dress pants, but the button down shirt he ended up with it is pretty lame and looks ridiculous on him because the arms are huge. The shirts are harder to try on because they come in plastic packages, but we could have asked nicely to try it on. I am not sure they have shoes, though...my wardrobe sucks, too, maybe we should go shopping! haha!