Booking.com complaint: Horrible experience

My issue with booking is about a reservation to a hotel in Paris called Hotel Du Roi Rene
I made booking for 5 nights at this hotel
1st day that lady took 90 minutes to check me in , she called booking.com like 5 or 6 times
The listing on booking.com says they can speak English, Arabic, French Italian , she barely speaks English, no Arabic at all
Finally after the check in she started listing rules for me , towels are changed every other day , there is an outside door that she close at 9pm she gave me copy of the key to get in after 9pm
Rules were weird for me she didn’t mention about cleaning the room, only changing towels, I was tired from long flight wanted to take a shower so I just said okay
Also Wifi was down for that day she said
1st day I returned at night got to my room
2nd day I left around 8:30 am the place ( supposed to be a hotel ) was still closed no one on the front desk, I returned back at 9:07 pm the outside door was stuck I wasn’t able to get in
I kept knocking the door, yelling at them maybe any guest or worker can hear me , an open window for that room above the door but light was off
Passengers in the street tried to help me with the door, calling their phone yelling too but no one helped
Finally I threw a coin on that open window luckily it did hit it , that was the room for the reception lady
She came down opened the door after 20 minutes from being stuck out
I called booking.com to complain, 1st call for 50 minutes , the agent didn’t help me disconnected the call
Called again was disconnected when I asked for a supervisor
Called for the third time ( 45 minutes) the supervisor seemed to be helpful but she can’t take any action to cancel my reservation move me to different hotel , she said management of that place I am staying at have to approve the request 1st ( which they will never do for sure )
On the 3rd day I did put a sign that I don’t want anyone to enter my room not to mess with my stuff or get in more issues with that place, they took the sign away, got into the room to change towels but didn’t clean the room, so they aren’t respecting my privacy request
I asked the lady if the wifi is working that I need to speak to manager for all my issues, she said no manager available asked me to pay the 25€ for taxes before getting the Wifi
I just left her to see what booking will do about my complaint, called booking on the third day spent 70 minutes on the line . The supervisor talked to her came back to me that I need to pay the taxes deal with that lady as booking.com can’t help with my issue
He said she claimed I am liar wasn’t locked out the previous night, I asked him to get the security camera videos, he asked me to tape a video if that happened again credited my accounts with 25€
So now I realized that ai am stuck with that place that lacks hospitality unprofessional company that just took my money then said we can’t help you, go help yourself
I spent my days left without talking to anyone there , towels weren’t changed again, for sure I didn’t pay them the taxes
During my stay I used to feel skin rash in the morning. I checked the mattress to find if there were any bug I felt disgusted about what I saw
The day of the check out I was down at 11:00 no one was there , I kept knocking asking for help but nothing, I taped a video called booking to let them know , call was disconnected as usual after 8 minutes before getting me to a supervisor , I didn’t bother to call again just taped a video for myself checking out , left the key on the desk left
Very horrible place experience with booking.com