Online transaction cancelled by supplier due to authorisation timing out but still deducted from my account.

Hi

Please refer to case number C-***8. My online purchase at Mr. Price was cancelled because Absa took long to send the authorisation, I then got notification from Absa that a purchase was made before the screen popped up asking if I accept the transaction. I then rejected the transaction as Mr Price had cancelled it from their side, but now the amount has been deducted from my account balance and is sitting as uncleared, please fix this, release the amount and do not clear it as I rejected the transaction from my side. How can Absa not see it was cancelled and rejected?

Regards: Ronnae