Hoteles Wyndham en Dusseldorf

I had a reservation for two people from 29/04/2022 until 02/05/2022. The hotel is not for sure 4*. I would say that it is more 2 or 3 stars. The room was not clean. No shampoos were offered, which is a standard for a 4* hotel. Only the same refillable hand soap in the sink and in the bath. No slippers are offered, which is also a standard for a 4* hotel. Take your slippers if you visit that Hotel because the floor is covered by a carpet which is impossible to be cleaned since everyone, even the housekeepers, enters the room with shoes from outside. The heating was not working, and the room was very cold. We asked why there is not heating, since the feeling temperature outside was 6 degrees (May in Germany) and the night receptionist told us that there is a rule from the municipality of Dusseldorf that shuts down the heating in all hotels in spring. This excuse seemed to me very weird, and I asked the receptionist if this is the case for every hotel in Dusseldorf. The receptionist answered me ”Yes”. Then I asked if all the residents of Hilton Hotel feel the same cold that I was feeling at that time and he smiled and told me that Hilton is Hilton, they do not feel cold and the room there costs 200 euros and not 50-60 euros like in Wyndham. So according to his sayings, the heating is shut to Dusseldorf's hotels according to the price and not generally to all hotels. Good to mention that 4* of Wyndham and 5* stars of Hilton do not justify a cold room. Finally, we asked for a second blanket and all the three nights we were sleeping with 2 blankets in a 4* hotel. The next day (30/04/2022) we had a really bad experience with the same receptionist again. We left the hotel early in the morning and we returned at 10:30 pm. Then, we realized that one of the pillowcases was dirty. We mentioned that to the night receptionist, and he told us that he could do nothing about it and since all the rooms are full we could not give us a new, clean pillowcase. I asked him if they have spare pillowcases and he told me ”No”. How is it possible for a 4* hotel not to have spare pillowcases? I asked him what we should do with the dirty pillowcase and he told me to sleep in that pillow without the pillowcase!! Oh my God this is not a solution!! Thus, in that night we slept two people in one pillow. Really bad experience. What kind of residency is that when the room is cold and two people sleep in one pillow because there are no spare pillowcases? The receptionist was really rude to us, he told me that we pissed him off, he was laughing at me ironically and when I was saying that I could not believe that a 4* hotel provide such bad services he told me that in his opinion the hotel is not really 4* and he wants to start working in a better hotel. Even the receptionist of the hotel admits that Wyndham Garden in Dusseldorf is not really a 4* hotel. He also told us that that we was planning to move us to a bigger and cleaner room as a upgrade but now that we pissed him off