False promo advertising on KWV special at the bar

I am on holiday, and was suporting the hotel's pirates Tower coctail bar on the beach front, all the time because they had KWV Brandy on promotion. On the 10th late afternoon I went there again and ordered a KWV promo and saw the bartender tacking a diffident bottle, then asked him to bring me the bottle. I then saw that it was Wellington, I said to him this is not KWV, he replied it was Finnish. I asked him to see the manager, when he brought over another gentleman, where I asked him the same but he also said that it is finish but he is not the manager and said the manager is at the Diaz Hotel. I went to the hotel and found the manager and asek him the same question, he replied that it was finish, and I told him it is false advertising, and he is cheeting his customers. He then went to take of the poster. But did not refund me and was rude. 20 minutes later he brought a bottle of KWV to the bar. How unprofessional for a Hotel. I will never go back to support them as they are crooks and cheats.