Bank charged but no airtime received

I recently purchased 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 eight hours, and no airtime was received. I received an sms right after the purchase and I was charged for the transaction, but I didn't receive anything. I still haven't gotten someone to help me. I would like my money reimbursed back to my account!!!