Shocking business ethics and total lack of understanding!!

Our company booked a room yesterday afternoon and only realized this morning that the receptionist booked at the wrong Mountain View. There apparently is one in Blackheath and Harrismith. After phoning and explaining our honest mistake we were told that its not their problem and we cannot get a refund even though their website does not state a non return policy. I have never come across a more rude person than Hannah who I believe is the owner! Surely someone in the hospitality business should have better people s****s and understand the situation. Its not as if the room would have been booked between yesterday afternoon and this morning as the website clearly shows many rooms available.