Lucky Youth Hostel - Probably the worst idea ever! Don't

I have been backpacking for the last 10 years and in my life I have never ever seen a horrible thing like this. Why? 1. We booked for 4 nights and the boss woman decided to cancel our reservation as we were 2 people and there was another group of 4 people who wanted to have the flat too. 2. Our flight had a half an hour of delay and when we called her *the ad on the site is that they can come and pick u up at the metro station- she said no you can not come now sorry you are late.. 3. We learned that we can just stay 2 nights at the flat when we arrived the flat and when her helper phoned to ask her she said 'if they do not accept this then tell them I will charge one night from their card and they can just go away and if you do not like what I am doing now I will also fire you, just do your business- 4. We got really angry and tried to call her but no she hanged up the phone on our face. 5.Most importantly this place do not have an office. Nthing seems official or safe. You pay the money to the intern guy and then you get the key. The woman is working from her home and if she wants she can just charge whatever from your card. 6. The location is ok but the house is extremely dirty and full of bugs. 7. So don't destroy your holiday. There are so many cool hostels at paris. Avoid this one.