Incorrect debit order - Bank refusing to refund

Bank debited my account 3 days before contractual debit date. Spoke to Thobile who put me to her immediate supervisor Shaun Adams. Supervisor told me that he cannot refund my money for some technical reasons. The money that was debit was my transport money and I therefore have money to go home or come back to work on Monday. African bank does not take accountability for their mistakes and have not helped my situation. I am disgusted.