MTN contracts are debited more than the agreement

Good day on 3rd November my daughter's bank acc was debited R2001 instead of R662 cellphone contract plus R299 home internet by mtn. My daughter called on the 4th spoke to a consultant named Hlengiwe and she said she'll escalate it. My daughter suffered financial problems due to this wrong amount debited by mtn, she had to borrow money for transport to go to work which is unacceptable. For the whole of November she kept calling(unfortunately can't remember all those agents) to find out when are they returning the amount that wasn't supposed to be debited. She always got the same response that "it's still looked into" What's looked into? If they can get anyone who can do a simple balance sheet for the months paid, it shouldn't take more than a month to re-emburse. Mtn......return my daughter's money ASAP😡😡 cos if it was vice versa you would've tried to debit over and over again till the debit order goes through successfully. Today we spoke to Rethabile (15th of December) he was also clueless🤷🏻♀️ at some point he said there's money outstanding 😡I ask to speak to his supervisor, he promised we'll get a call from him/she today. Its 23:50 and no one called. Mtn has unprofessional people from agents to supervisors and managers. I want my daughter's money that she works very hard for reimbursed before end of this week.