Hotel Agon Lichtburg in Berlin

I was very enthusiastic about my visit to Berlin and indeed everything went according to my plan except one thing that is not negligible. The hotel we stayed in turned out to be very bad not because it was dirty or something like that but very rude receptionists. In all my travels I've never met such rude reception staff and I have been to a lot of places. I always book my room through a travels agency, pay for it before the trip, get a voucher that I turn it at the reception and never have any issues. It's been like that everywhere but not this time. Almost everyday 3 receptionists, 2 women and a man past middle age treated us as freeloaders. First we were told we didn't pay for the bed & breakfast arrangement so we had to show them our voucher again to prove we payed for the breakfast and the next day not only we were told we didn't pay for the breakfast but that we didn't pay for our room as well. The insolense of the mr. Receptionist went to such an extent that after we showed our voucher again, he told us it was just a piece of paper and we would have to pay for the room again. After these incidents we called our agency to intervene and after everything was settled we didn't even get an apology for everything they put us through (this went on for 4 days out of 7 days of our stay). However room maids, breakfast staff and the young lady working at the reception in the afternoons were very kind and lovely, every day we would get a warm greeting and a smile. The rooms are good and clean and I have no complaints about that. I'm not a particulary picky person but I find the staff-guest interaction very important therefore I would not recommend this hotel. I loved the city but I'm not coming back to this hotel ever again.