I'm confused. 13 weeks ago was the end of August. Who orders uniforms at the end of August and expects them before competition season? I get that GK probably told them they could do it, which isn't cool, but 13 weeks really isn't that long - they always take at least that long. If you want them sooner you probably shouldn't wait until the end of summer to order (considering 1000 other gyms have ordered before you at that point).
Not trying to be rude, and I'm sure they're upset and want their uniforms. Just a thought