Hi, eventually our K1 was approved, but it took 2 years. Every month we were contacting USCIS or NVC to get an answer, as we mentioned before, we contacted senators from the state I live, eventually the case was in Panama (no notification from USCIS, the embassy sent us an email with the next steps). My recommendation is to contact as much as you can to everyone, even the embassy. It's exhausting but I think if you wait for a notification, it might take even longer. I met someone that their case was sitting in the embassy for 2 weeks and they never got the notification until they called the embassy to ask for it.