On Monday 24/05/2021 I bought airtime using their card payment method on the app

On Monday 24/05/2021 I bought airtime using their card payment method on the app. I received an error and I did it again. I checked my banking app and it had not cleared however both payments (error included) were charged to my card. I did not receive the airtime and it ended up charging more as it only cleared the following day. It’s now Thursday and the money has not been returned to my account even though I did not receive the airtime.