@ljem Hopefully your MP will get back to you really quickly, mine did.
I just wanted to say to try call and ask to speak to the complaint department. I did this after also emailing my MP, I explained to the lady how anxious I was and how it was affecting me mentally with worry. She said she would get a message over to the office dealing with it and explain what I told her and note the date of travel again (was already on there from twitter dm). She also said she would mention that I was making a complaint.
1 hour later my application was approved. I have no idea if it was the MP, the complaint department or twitter or a coincidence.