Correcting mistakes

I always put airtime on to my grandmothers phone and last month I accidently transferred the airtime of R110 and data and sms on to an old number that was ****** a while ago. <br> I went into the Vodacom shop to try and fix the problem, after sitting there in the new store at the Greenacres shopping centre for 71 minutes before my number was called to be served. The guy told me that nothing can be done. <br> I told him that was unacceptable and that they can see on their system that the number where I transferred the money hasn't been active for probably a year of more. <br> He then went to his manager who informed him that I must give them proof of where I transferred the money and I went on to internet banking and printed the proof of payments out for the person who helped me. <br> He then said that they had to sent it to their technical department and they would then transfer the funds within 24 hours. <br> Well BIG surprise the my gran received a message saying that they cant transfer the funds!! How the hell can they not transfer it??????<br> And they also wont allow me to do a swim swap because it is not my sim. So now I just loss the money and that's the end of it! HOW CANT YOU FIX THIS????