The hotel deducted my account twice for the same booking.

I was a guest at Waterfront hotel in Durban. I was told my direct booking with the property was cancelled due to the invalid cvv number I had supp****. I then went ahead and made a booking online agency which deducted my bank account on the 15/Nov.The hotel then deducted my account again on the 17/Nov.The property refuses to refund me.