Do anyone know where i can find opensource or paid ready-made solution for cryptocurrency exchange simmilar to ShapeShift or Changelly?  I need ready-made solution which I will not need to modify.

Hi everybody, I'm really worried about the Poloniex exchange. About 1 day ago, I asked for level 2 verification in order to withdraw some ETH. I received very quickly an error message saying that verification session is expired. I tried to pass verification again but constantly got a message stating that the session is expired. Given that the matter was urgent, i sent a ticket to the support. I have not been contacted by the support team and still cant pass level 2 verification. Did someone have the same problem?