UPDATE: Yesterday I remembered that they had emailed me in November 2021 asking me to mail to them copies of all our passport pages, so I decided to take a chance and reply to that email last night. This morning I got a reply and they said they will be scheduling us a date for the ceremony in due course, and the signature was from the Scarborough Office. Obviously not the response I wanted to hear, but at least now I know which office is handling our applications and I have direct contact with them, trust me, I will be emailing them every 2nd day until they get tired of me.