You owe me

I hooked accommodation for 4 adults in April 2020. Deposits were paid on time as was the balance. Due Covid-19 the accommodation had to be cancelled. I requested a refund. According to the website, I had cancelled outside of their stipulated time, but was told there is a cancellation fee of 25%. On the website (still there for all to read) it clearly stipulates a R25.00 administration if cancelled within the stipulated period. This was disputed by Sanddrif, however, I eventually was paid an amount. However, I was shortpaid by R485.00 and I would like to have that money refunded. I have written reminders. I have been ignored. There has been no response to my requests.