Bad experience from UNIFI

I took a loan with Unifi and on Friday it deducted its money as it was supposed to and I wanted to finish of that loan and paid of the remaining balance into their Capitec Business Account. I forgot to write my ID as references and called them to let them know about the mistake I made, they said I should send proof of payment, I sent maybe 5-7 emails with my proof of payment attached to it. I called them again after calling several times and they said it will take atleast 24 hours for the amount to reflect mind you it was on the Friday and I have been checking the website over and over again to check if that loan is closed but nothing has changed. If they won't be able to close off that loan can I have my money back and they will deduct their amount next month. I can't wait for this long