The garage manage has harrassed me

I was a customer on the 5th October who made a fuel purchase of R100.05 but the manger who assisted me that day did not give me the receipt of the payment he told me to leave my contact details as the speed point had a fault and he might have not recieved the payment,two days after we recieved a call from him saying that the payment had not reflected,whe i che ked my bank statement it showed\Outstanding authorization"";on the 08 October i withdrew another statement which reflected the payement at jabulani service station i took this payment to the manager and asked him if he had recieved his payment he said now i showed him my statement and told him that the error is with his merchant and he should take it up with them;he then asked me for my card number and i refused and told him that i work for the bank and wouldnt give me my card number and told him that i will deal not accept any responsibilty for the payment that had not reflected as i had given him proof and left him to investigate;A few days later he then called to say that he wants the money and he had been to the branch a """