Fit for Work Interview

I have had flu for almost 2 weeks and my post does not come through my door as I have no letterbox flap. Instead it is downstairs in a communal hallway. I last checked my post on Friday only because I was throwing out a really smelly bin bag. Today I opened my postbox downstairs and I had a letter dated 25th November and an appointment for yesterday. I am really stressed now as my money is going to be stopped, please help me as I can't stop shaking. I suffer from extreme anxiety and I do not check my post daily even when I am well. What can I do? I had an interview last March 2018 and I was so stressed they said I wouldnt have to have one for another 3 years, but one year later and they are asking me to attend again. I do not know what to do. How much notice should they give?

How have they given me 7 working days notice. It was not in my mailbox on Friday 29th November 2019. I assume it was posted 2nd class. I do not check my post every day even when I am not ill.

i said it was dated 25th November, they could of sent it later, but it was not in my mail box on Friday 29th November. So is the 7 days from when they date the letter, even though they are sending it second class and might not post it on that day. My son pays all my bills I do not need to check my post more than once a week. Obviously if my mail came in my front door then i would look at it.