Upon arriving to the AirBnB, the host was not aware of our arrival and another person who worked at the "hotel" demanded us to show proof of our payment for the room before being allowed to enter. This person then demanded to take pictures of our passports with his cellphone, we still have no idea who they were or what they were going to do with the pictures as he did not speak English.
Then we were put in a random room, which had the windows left open and no heating. It was around 10 degrees celcius in the room, and the heating system did not function, so we had to wear our jackets and shoes inside, also, the bedsheets were thin and it was nearly impossible to sleep from the cold, and taking a shower was unbearable.
The accommodation was also not very well maintained and it was unclear as to whether it had been cleaned before we arrived.
Nearly every morning at 7:30 or 8am we were awoken by someone who worked there shouting on the telephone and on the first morning he knocked on our door at around 8am and very rudely demanded this "tourist tax" of 4 euros per person per night in cash only, and refused to give any solid evidence nor a receipt for the cash we were forced to give, otherwise we would have been thrown out.
It was a very threatening experience for someone who is a guest in a hotel. We paid the 32 euros and because we had asked questions about it, he came back to our room and made me talk on the phone with his "boss" who was very aggressive in his tone, I still have no confirmation as to who this person was who I spoke with, but it was not Mohammed, who is listed in this ad.
The main issue with the tax is that all of the other AirBnB's in Venice have the tourist tax written on their ad and this one does not, giving the impression they do not ask for it (or it is included in the price) and we were never told before arriving that we would be forced to pay in cash, otherwise we would have chosen a different place.