Booking cancellation

Cape Castle Penthouse has cancelled my booking and refunded my money just in 6 days before my weekend away how is that possible. The was no explanation nothing no phone call only this morning I wake up on an email for cancelation with money back to my account and they are afgering me another place which double the amount from what they charged me, really? I'm so ****ed off bcz I thought I'm done with the booking until now. How can they do this to me what kind of customer service is this "Cape Castle Waterfront"