Lost airtime

I bought airtime yesterday using the app. I bought R12 MTN airtime and when I checked my bank account balance it had deducted the amount but the airtime wasn't through. I thought maybe I made a mistake so I bought airtime again for the same amount and it deducted again. When I realised I that it was a problem I called the capitec customer centre using my other phone. The lady told me to wait for 24 hours. This is 36 hours later and I still haven't received my airtime