Payment not credited

Payment made via Internet Banking. Payment went off my account. Payment not credited by Sanral as Sanral alleges payment not received. Requested Sanral to follow up with their intermediary, Sanral refuses, says I must follow up with my bank to cancel payment. I feel I've done my part, and it is now an issue with Sanral and its intermediary. At a time when many have stopped payment of their E-Toll accounts it is astonishing that Sanral displays this lack of customer service in respect of someone who is willing to pay . I'm now converting, and in my view have a credit on my account, and for that reason will mot pay 1c more.