This is the risk of using exchanges, regardless of their trust level. As Potato Chips said, you have done nothing wrong on your end if all you did was trade, it's their problem that they are not sending out withdrawals on time.
I would suggest consistently creating new support tickets or send a support email every 2-3 days to follow up on the issue if they do not respond to you. Make sure to include previous communication with them as well to demonstrate the lack of action. Do so on a multitude of platforms, both on their support centre, and FB and twitter. It also seems like that they're based in Lima, Peru, so if you do some digging and you are in that country you may be able to take some irl action, but it's very unlikely.
But that's all you can do at the moment. Keep communications going and be patient. Based on what you've shown I would regard this as a very shady exchange with a very unresponsive support which no one should use in the future, given this incident. However, in the future, I would suggest that you also use a different exchange that has an announcement thread on bitcointalk and a good reputation based on people on the forum as well so that you can actually PM them directly on forum, instead of one that can only be reached via social media and support.