Welcome to Macau! Senado Square to Ruins of St. Paul are full of tourists, most macau people don't go there, lol. I don't recommend the second place that you went on the first day. I don't know if I get your words wrong that you spent MOP500 to take taxi from airport to hotel, please call the police if you meet this problem next time, the taxi driver lied, it should not be that expensive.