@Anna851
The host got upset because he was not paid, he's probable read the Airbnb terms and conditions that state that the contract is between Guest and Host and surmised that you had not paid him.
It must be hard to see someone every day in your home for the duration of the stay, that has not paid for the privilege. While I’m not condoning His/her behaviour it might have been a better approach to help him solve the payment issue before you offered helpful advice about your bedroom door.
Airbnb keep accepting new hosts without even a preliminary test as to their understanding of the systems, properties, and methods.
Having usually received payment a few days after the guest arrived, I’m wondering had the Host set up his banking details correctly?
Only once I had difficulty being paid, when the Guest apparently had no money in her account due to a banking issue, the guest paid me cash and the issue was resolved three weeks later by Airbnb when I received payment again, I duly returned the cash to the guest and everybody was happy.
Contacting Airbnb is a nightmare and one of the most frustrating experience you’ll encounter on this platform add into the mix inexperience and kaboom you got a stressed out Host.
You did not mention how much a bargain in monetary terms it was. My first guests (a party of four) stayed in my Apartment for four night for the price of one due to my mis understanding of Airbnb currency set up, they were the most high maintenance guests I had, but they assured me that they'd give a good review.