Bad service

My kids have been attending this school last year in Protea Glen ext 26 named Acudeo College. I have been paying my kids school fees in time and ended up in are credit which they dont want to pay back. I was told to email the statement, and some documents they let me fill in before the 15th December 2021 which I did when ever I follow up they know telling me to send confirmation letter from the bank which is bull **** as they never said that from the start. This Manake women keeps on sending me the same email over and over and dont want to refund me back. I need my money back as my kids are no longer in that school.