Best Western® Hotels in Hounslow

I need to preface this with: I booked this 2 months ago for 3 people. We arrived via a side door, checked in and told our room is on the second floor. We weren't directed to stairs or a lift, we just had to find out own way. Once we made it up the four flights of stairs, we were greeted by a room with 2 beds.. But there are 3 of us! We immediately call reception to be told that they are looking into it and will call us back. We sit in our first (YES, FIRST) room for 20 minutes before chasing up with the reception staff. We are told that a colleague is on the way, Great! We meet him in the stairwell as we weren't sure he would be able to find us. He advises that there aren't any rooms as they are fully booked. But sir, we booked a triple room, 2 months ago, why was this not accommodated for at the time? He said that they had a potential room in the basement we can look at. We query if there are 3 beds, his response ”just come and look”. Again, we ask: Are there 3 beds though? - ”Come and look, we can get you more blankets if you are happy with it”. Sorry sir, excuse me? He then informs us that we can leave our bags in the HALL WAY. We are not leaving our belongings in the hallway. We go down 6 flights of stairs to the basement to be shown a studio flat with 1 double bed, a single bed in an office and... yes.. you guessed it.. a sofa. Ah, that is why he said he can get us extra blankets. We inform the member of staff that this isn't acceptable. He states that there are no more rooms. We reiterate that we booked this 2 months ago for 3 people and wonder why we haven't been accommodated. We are THEN told there is a room, but the lights don't work. We go in and the lights do work but one of the beds has been slept in, the toilet is dirty and used (as has the shower) and there are hand prints on the ceiling. The wifi also isn't reliable. We ask for 3 pillows - receive 2 (as the beds didn't have pillows). We tell the member of staff that the toilet is dirty and he says - quite flippantly - ”well.. do you want me to come and clean it?” I'm sorry but he should be saying that he WILL come and clean it. The room has obviously been used and not cleaned at all. We are woken up by people walking up and down the corridor banging loudly (We are in the basement remember) and I am pretty sure someone tried to come in, but luckily we locked the door!