Yes, second elevator, big complex, nice fancy lobby. Woman (5’3ish, busty, chubby, short blond hair) I saw speaks great English (w accent) and has standard rates, not $40.
(Also, I don’t follow your last full paragraph. Original ask was 50, you paid 40 b/c of terrible service. She wanted 10 more to get the original ask. Then you pretended to give her 40 more but just left when you had the opportunity?)