They refuse to credit my money that's on my stuvia wallet. ****merish behaviour!?

I have a stuvia credit on my account and the document I want to purchase is only a few rands more which means there's no way that I'll be adding R250 to my stuvia wallet especially since my studies will be over after I buy this document and there will be absolutely no reason to use this site anymore. I went ahead and I reached out to the help centre and they said they will credit me my money a month ago . I waited and i noticed that they didnt credit me my money . I reached out again and they refused to credit me my money! First they gave me excuses saying I gave them the wrong branch code when I clearly did not ! . Then they tell me to look for a cheaper document when there's none . I have looked and I don't think it's very professional to tell me what to buy with my money !? . Absolutely pathetic customer service, I don't recommend putting money into your stuvia wallet because come the day you no longer need to buy documents from here . You mostly likely will be given the run around and then refused . Isn't this ****merish behaviour ? It looks that way to me and I most certainly will not recommend anyone using this site .