how to cope with bookings double & triple same time??

simple question How do I edit my listing I only just got it up but its all wrong

Hi, how can I confirm the location if this is my secondary place and my main residence is in another country. There is currently nobody at the rental place and

I have not received the letter confirming my address. It was mailed on March 18. Please mail another letter asap or advise of what I should do next. Thank you