Absa Bank has a faulty atm that takes money from your account african bank can't help in time to get money back

I would like to express my saddest experience with banking at African bank. I went to go withdraw money at an absa atm using my african bank card the transaction went through twice on my account but i did not receive the money absa investigated and found the money but requested that I go to african bank to ask for a case no in order to deposit the money back into my account. The service at african was dismal told me that it would be done in 30days it's their policy. At that this was schoolfee and stationery money that had to be paid in on the 16th of January whereas school started on the 17th. My son is not in school because of afri an bank policy where they failed to assist me with a reversal of the money I spoke to different consultants on the customercare line all gave me different excuses. They have not called me back with a resolution my son was supposed to start grade 3 today. He is sitting at home whereas he's peers are in class as his mother failed to pay his fee because he has to wait 30days. Please assist the matter