Un-Used Credit Voucher , Disappeared on my Account

I am not happy with TAKEALOT. On the 5th of July 2025 i login to access my Voucher worth R500.00 which I had loaded sometime in Late December 2024 or early January 2025 . I had to use it for my son's birhday gift purchase which was on the 06-07-2025 but to my surprise the Credit amount Voucher of R500.00 has miraculously Disappeared from my Account . I have never used the voucher so please tell me where did my R500.00 credit voucher go to.