Four Seasons Hotels complaint: Staff behaviour in dealing with guests

We were at Fourseasons Hotel Amman Jordan / Five Lounge last night 26th July between 9:00 – 12:00 pm. We were 6 people two of us had loyality membership cards.
When we made our reservations we were not informed that there is a minimum charge of 40 JDs pp. We were surprised with this when the waiter came up with a suggestion to order more as the bill will be a minimum of JD240, and we are JD65 short. At bill payment we decided to bring it up with the supervisor there telling him that they should at least be clear from the beginning in telling guests when they reserve about this. Surprisengly, the suervisor who was in charge got immediately defensive, and his tone of voice, reactions and excuses he used were unprofessional- especially being at such an esteemed top notch hotel. He sweared to god that we were told at reservarion time and when confronted if he took the reservsrion he sais No … so we asked him how come you swear on others behlaf when you dont know the conversation that went on the phone ? His answer was coz it is a defualt thing to tell the customers but obviously that did happen wirh us . The guy offcially ruined our night with his attitude.