Help !! Possible Online Fraud !!!!

[gtfpv]

we have just booked some accommodation . online after a phone conversation. we were given a choice of 3 apartments to rent for a week on the gold coast all owned by the same holiday company . owner.
we sent a deposit online . and received an E'MAIL . thanking us for the booking for a 1 bedroom apartment in a complete differant building . with conditons stating deposit non refundable . the offer by phone was for a 2 bedrrom 2 bathroom apartment in a differant building .
what do i do . the bank is closed untill tomorrow . will i be able toi cancel the deposit or is it immediately paid on a credit card ????
it was either a mistake , or very clever fraud . or i am a very stupid customer .

any advice taken . thanks has this happened to anyone else here .???