disappointed with standard bank service

hi , My name is Mayele, I am very disappointed with standard bank service. I am a prestige customer and have been trying for the last 36 hours to locate my banker whom I have never have contact with but according to standard bank records , the person exists. I have mistakenly overpaid one of my beneficiaries and would want Standard bank to reverse the payment because its for my son's school fees, the school fees debit order goes off today and I haven't received any feedback from standard bank and my account is not debited. I went to the Woodmead branch yesterday morning. please assist.