Hello everyone, we finally received pre-arrival letter on May 1st and Passport request the following day. It took us almost 12 months, however i believe it took us long because there was lack of evidence in support of genuineness of our relations with initial application. That is why we got so called Procedural Fairness letter on March 15th. We collected as much evidence as we could and sent them back. Now our journey is almost over, waiting our passports back with visas.
I would like to thank everyone for sharing information which helped a lot. Wish you all the happy end.