Mabula Lodge refuses to refund 100% deposito

When booking a three-day safari with the lodge for the end of March 2020, they demanded a 100% upfront payment. Now, with the lockdown due to the COVID-19, when they are unable to accommodate us, Mabula Lodge refuses to refund me! First, they offered a voucher valid for 15 months, which is useless to me since I am from New Zealand and do not plan to visit SA within the next 15 months (for which they said the voucher would be valid), next thing, they refuse to negotiate further. This is unacceptable and a total rip-off! Firstly, they had no expenses whatsoever upfront for this booking and secondly, they are in breach of the Consumer Protection Act of 2008. People be aware of these ********!!!