Letting my Time Share Unit to another family without my permission

I wish to make Southern Sun Resorts aware of a situation which I consider totally *********. I have a permanent unit, Unit 504, at Beacon Island Hotel, purchased from Leisure Portfolio Association (LPA). This year I was not able to occupy the unit, so I offered it to a friend of mine, who could only utilise part of the week. I gave my friend all the reservation information and emailed his details to Beacon Island Hotel. My friend did not inform me about any issues at reception, because it was a gift to him. It was only when I spoke to him about two weeks later about the view from the room, that he mentioned the change of Unit to me. When he checked in to Unit 504 at Beacon Island, he was told that the Unit was occupied. As he had all the relevant documentation with him, Reception seemed perturbed and told him that they were preparing the room for him. He had to wait for more than 30 minutes in reception before he was allocated Unit 124, which I subsequently found out, is a stock Unit. I contacted LPA and spoke to Matt. I asked Matt how it was possible for LPA to re-allocate my Unit to someone else. Matt assured me that he would follow up on the matter. Matt contacted Beacon Island and Reception told him that my friends had requested a family unit, so Reception moved my friends to a larger unit. I told Matt that it was untrue, because my friends are a retired couple with no children. Matt suggested that I contact Beacon Island directly, as Unit allocation has nothing to do with LPA. Beacon Island Reception told me that my guests had requested a unit with a pool view. Another untruth. They had never been to Beacon Island and had no idea of the different views from the rooms. I contacted Beacon Island Management, spoke to Andrew who promised to follow up and get back to me. When I had no feedback, I called Beacon Island again two days later and spoke to Ronel. Ronel knew nothing about the allocation. Still no feedback, so I called again 2 days later and spoke to Andrew again. Andrew repeated the story that my friends had requested a Unit with a pool view. It is very clear that someone is covering up mismanagement. Unit 504 was occupied by a couple with two children. It seems that they must have asked for a Unit for a family. What were they charged for occupying my Unit without my permission? I would like full compensation from Beacon Island for the letting of MY unit to other persons, without my permission and without even informing me of their action. On Friday 30 June I was phoned by Andrew. He informed me that his Head Office had been made aware of the situation. He said that I would be contacted by them on Friday afternoon or at the latest on Monday 3 July. I have still not had any communication, so need to ask Hello Peter for help.