all dreams vacations ripped me off miami, Florida

i was listening to the radio when they said if you get the right answer to their question you can win an all inclusive trip to dominican republic for two adults, 4 days and 3 nights for two persons and another  trip to orlando florida two adults and two children. then they told me that i have to pay for taxes becouse everyone has to pay taxes and i know thats true so i gave them my credit card they said they was goona charge me 300 us dollars when i saw my credit card statement it 378 that they charged me i was trying to call them back but their phoje number didnt work i told my husband and he started investigating online about all dreams vacation and he told me that it was a scam i couldnt believe it because its a radio show but then i noticed that their phone numbe wasntworking i tried to find them online didnt find much info i tried diffrent things nothing worked to get in contact with them i want a refund of my money if anyone can help me please email me wit information.