Standard Bank Overcharging for Student Loans

I’ve been paying R700 monthly for a R30k student loan account number 33 186 399 5, for my daughter from 2019 and Std Bank is not sharing statements. They’re not reachable on emails, phone and their branches can’t help either. Calculating R700 over 6 years = R50,400 paid, and over 7 years that’s R58,800 and they’re still debiting my account on a monthly basis even though the balance shows 0.00. I need someone from Standard Bank to help me clarify all of this and reimburse me any money overpaid for this loan. I will be escalating this issue with the banking ombudsman’s office as well, as a desperate attempt to get resolution on this.