There were several electrical power blackouts, the longest lasting 12 hours with no heating, no hot water and no wifi. About 30 mins into the blackout, I called and texted the Host, VNG Property, I had the name and number of a specific person, they never responded.
The wifi was the same, on day 4 of my stay the wifi stopped working and I had to use my own hot spot.
The owner, who is not the Host, lives next door and started a full scale renovation with jack hammering, drilling, sawing etc etc all day everyday despite advertising the apartments on Airbnb as available.
I left the apartment for one week and travelled to get away from the noise hoping when I returned the renovation might be over. it wasn't, they were now renovating on the weekends also.
This was when the 12 hour black out happened, so I contacted Airbnb, cancelled my booking and got a refund. I only stayed about 10 days of a 30 day booking.
This Host, VNG Property is a property agent with many apartments who asign a junior member of staff to be your contact, They don't know anything about you, the apartment, the apartment building or the area you are staying in. I am not sure why this kind of Host is be allowed on Airbnb.