Money reversal on airtime not received

I recently bought airtime using the Capitec banking app. It said something like an error occurred and I didn't receive the airtime, so I waited for about 5 minutes and purchased again, still got the same error and no airtime was received. I just saw on my statement that I was acting charged for both transactions yet I didn't receive anything. I still haven't gotten someone to help me. I would like my money reversed back to my account!!!