I called a recent phone number for Jon that I have dug up through sources. Didn't record it, but convo went like this.

Jon: Picks up phone, silence
Me: Hello, is this Jon Montroll?
Jon: Yes. Who are you?
Me: I'm a weexchange user. I need access to my funds. I will not wait indefinitely.
Jon: How did you find this phone number?
Me: Do you have enough liquid BTC on hand to pay all weex deposits?
Jon: Where did you find this number?
Me: Do you?

Jon hanged up. Further calls were unanswered.