No service from SB on data purchace error

I bought Airtime and Data using the Standard Bank app on my phone, and I got the error to try again later. The money was deducted from my account but I received no airtime or data.<br> <br> I reported this to Standard Bank, but they are washing their hands, saying that on there terms of service, I need to sort this out with my service provider, MTN.<br> <br> But I disagree, this was a integration error between Standard Bank and MTN, and when an error like this occurs, how can they deduct the money from my account??<br> <br> No wonder so many people are moving to the compitition