Having completed all the necessary steps for a K1 interview at the London consulate (DS-160, medical interview attended, etc), we have registered at the requested Visa Appointment Service website at https://ais.usvisa-info.com/en-gb/iv. We chose our courier preference and have advanced to the stage of paying the MRV fee(s). It is my understanding that this is the point when an interview can be scheduled. However, we are unable to pay our MRV fees and are met with the message: "There are no available appointments at this time. Please check back in a few days as the Consular Section will open more appointments." This has been going on for well over a week. As with so many applicants who have suffered long delays all through the application process, we are desperate to finally schedule our interview. We have been refreshing this page every few minutes, 24 hours a day, for the last 7 days without any change. When I phoned the interview scheduling number, they simply read me the same message verbatim and told me to "keep trying". I have submitted an online request to the London IV Unit via their form, and I have sent an email as directed by the person who was answering the interview scheduling phone. I await their responses. Just wondering if anyone has encountered this message in the past (and if so, how long the delay lasted), if anyone has successfully scheduled a K1 interview in the past couple of weeks in London, or if anyone has navigated this issue at all?