I am staying at a Marriott London hotel. We prepaid a non refundable room for my family with exec lounge access - this was not inexpensive! We paid and booked in May. Early this month, I contact the hotel via FB asking about tickets and to obtain the exec lounge hours for breakfast, tea, happy hour. They informed me that the lounge is closed and will be until late August and that for the time being, the have a spot in the restaurant. The hours are much shorter - until 10 pm vs midnight as the original lounge had. I look and now they have the notice that the lounge is begging refurbished etc on the website. This is prepaid non-refundable rate so we are stuck. We arrive yesterday close to 10 pm and via the mobile app, I asked if we could at least get a soda if we are there a bit after 10. We get there at 10 - the FD person lets me know that she had replied to me. She then informs me that I am a Gold and that exec lounge is for Platinium and above so she doesn't know why I was asking these questions. I tell her we have a room with exec lounge access. She tells me the room we are in does not have accesd. I show her my reservation and apparently the hotel moved us to a different type room (nothing better than our original room). She then tells me she can give me access "anyway "which irritated me even more since we had paid for this. We went to the lounge area which is a small area in a rather sterile restaurant, I really don't complain but between not bring informed when we paid, having the hours shortened, not a true lounge and the front desk dismissing me etc.. I do want to obtain compensation. We would not have booked this hotel and paid extra and the treatment just compounded the issue. I have read the Marriott Twitter and FB is not that responsive. I would appreciate some advice on how to ask. Note: I can't get into my real FT account so I created a new one while I am still at this hotel.