Unprofessional treatment

I am very very annoyed and angry! After spending a weekend of our anniversary in Gansbaai at Sea Star Cliff Hotel I am very disappointed that they are having problems refunding me my double payment! It was supposed to be a great weekend at a 5 star hotel but it left a bitter taste in my mouth and would never recommend it to anyone I know. When it was time for check out the manager (Andrew) asked us to make a payment for our stay. I was confused because I booked through booking.com & I made a payment while I was booking BUT according to him there was no payment attached to our booking!! When I wanted to pay with my card, he insisted he only accepts cash payment! We then went to withdraw money to pay. On arrival at home I checked my bank statement which reflected the payment was made on the 27th August and we checked in on the 29th August. I called the hotel and spoke to the Andrew who was still adamant that there is no payment reflecting on their account!! I thereafter sent him my bank statement showing the payment. Only after seeing that, he said they will make a refund payment for me. He didn’t refund me for almost a week & had to call to find out when I was going to get my refund. After a week he deposited part of the money and said he’ll deposit the rest soon. It’s been a week now and no deposit!! I called to request to speak to the owner of the Sea Star Cliff and he said the owner does not want to speak to me. I told him I am going to make this known ( ie how they treat their guests) on social media & his response was “we don’t give a damn about social media, many people have threatened us about social media and that won’t do anything to our business”! I am not a company and I need my money and all I want is my refund which is not even a fraction of what they make in a month. I hope someone can help regarding this issue. They don’t give a damn about bad publicity he said, but I want my money!