@Daria20 oh dear! I am sorry to hear that, but I would count it as a lucky escape. Sometimes it's just not worth the money!
I had a similar experience recently, although not as bad. Guest wanted to leave his bags here for a whole day after he left. I said I couldn't guarantee this as I didn't have my work schedule for that day yet. He was desperate to book and kept messaging me. I took the booking only when he would clearly confirm that he 100% understood I couldn't guarantee either an early check in or for him to keep his bags here for an extra day. I sent him left luggage details just in case.
This is what he responded:
"thank you。When you ensure your time,if you cannot do me a favor, i will find a station to put my bag。I am so grateful that you will tell me your plan close to that date。Anyway,A great start for us to know eachother。smile"
As it turns out, I had to work on the evening he wanted to pick up his bags. When I told him, he immediately cancelled with a very short, terse message. This was a couple of hours before the cancellation policy kicked in, so he got a full refund, but I was unable to get another booking, even in high season, due to the short notice. Fine. I thought to myself that it was better I did not have this person stay in my home. I have a feeling he would have left his bags anyway and taken my keys. Or, left in a huff and left me a bad review. Who knows what other hassles he would have given me while here. People who ignore your rules before they even arrive are bad news!
Sorry about the abusive messages you have received. You are very right to report/flag him!!