Telkom Clear my mom name from your Debit collectors

In 2022 we went to Telkom at Clearwater to take a contact okay everything was going well the contact was approved by the head office but the store manager said that she wants time to review my mom payslip so she will call between 5-7 days but weeks passed and that same month end Telkom tried to Debit from my mom account then my mom blocked them so they took her name to debit collectors then we went back to Telkom to report they then opened a case which later on sent an email saying the case is resolved but my mom name is still not cleared this year we went back same thing happened case number then case closed We need an address for the head office and we want my mom name to be cleared