Join the dark side and pick yourself up a hi-capa with a few mags, most fun ive ever had in CQB, alternatively the ARP556 is by far the most popular cqb gun from what I can tell, good bit of kit if you don't mind being written off as a speedysofter.
Just give it a few more weeks, Ali are pretty great at refund imo, I even received a free mk18 rail when I tried to return it for being the wrong length. best thing to do is wait it out.
From what I've heard and seen Cyma ak's are great quality for the price and built like a tank. However I don't own one personally so you might wana ask about. (Also I've heard that Taiwangun are really good for them due to price or something)