Payment for damages caused

I visited BP Viapoint Crown Mines to fill petrol at the end of December and the petrol attendant when cleaning my windscreen damaged my wiper blade. When addressing this with the Manager (Gregory) he advised me to replace the wiper and send him the receipt and my bank details and he will refund me the cost. I sent the receipt and bank details through a few days later and have been following up for payment since then but have received nothing. Early in Jan he advised that they were awaiting payment from Head Office but after that they haven't even been responding to my e-mails or my sms's or whatsapp messages. Very disappointing service. Will not fill up there ever again.