Bantry Bay Suites Hotel Cancelled my accomodation

I booked my accommodation with Bantry Bay Suites Hotel in Cape Town on 4 November for one night in 2 weeks time. We were flying for a wedding in Greyton which is 2 hours outside Cape Town. So we were planning to spend one night in Cape Town and then drive to the wedding venue the next morning. Once I had landed in Cape Town from Johannesburg just after 2pm on my way to the hotel in the Uber Cab, I saw an email from the Hotel stating that they could no longer accommodate us due to an unfortunate incident. I immediately called the hotel and they had many stories but in a nutshell they said they were over booked and were relocating us to another hotel all the way in the middle of town. I then had to re-direct the cab (at my own cost) to this other hotel. The other hotel was in such a busy and noisy part of town~ I wanted to go for a quiet run in the morning. This was not going to happen here. I called and asked them to refund me and I would choose where I wanted to stay. This all happened on Friday 13 November. Today is Wednesday 18 November and I still have not been refunded my money.How do they overbook? How do they decide which guests to move?