Airtime not received

On the 21st of September I bought airtime via my cellphone banking app. Not one not twice but three times and out of all those time not once did I receive my airtime. I even went to the extend of calling my bank to find out if they had a problem on their side which they didn't. I was advised that they have been experiencing problems and that they also haven't been given a clear answer as to whether of not I'd be refunded with the money or actually receive the airtime. I've called my bank several times and been given the same answer. I have my bank statements to prove this. This is unacceptable and I'll be moving from cell c if they cannot resolve this matter ASAP.