I reserved a king bed view room (Which costs about...

I reserved a king bed view room (Which costs about 10euro more than the normal room). When I checked in the room was a twin-bed room. I requested to change the room and the reply from the front desk was (can you manage it because you're staying only one night). I requested to change the room then the room was changed to a king bed room but this time without a view.
The room was so dirty and there were stains on the floor. on the matters. The room had the smell of smoke although it was non-smoking room.
The toilet was clean, but when I took shower all the water stayed at the other end of the tub. the tub was imbalanced so the water didn't drain.