Absa banking

On the 25th of April I was trying to buy data for my sister using the MTN app we inserted the absa card number, cvv and everything. We tried 3 times and all the transactions were unsuccessful and only 2 of the funds came back to the account but one of them didn’t return and it been written uncleared on my app. I called absa and they said I must send an email, I did and I got no response I went to the branch and the lady sent an email again and said the funds will return in few days they have not returned. I tried calling them and the lady put me on hold for like 15 minutes and never came back I ran out of airtime and I bought one again and I was put on hold again. They do not even call back even after I have told them that I’m gonna run out of airtime again they just don’t care