Inability to Assist with query of R7000

Mr Nkosi (ID ***) logged a follow up query with African Bank after a payment of R7000 was paid to African Bank in error at FNB Paulpietersburg ATM. I wanted to pay to Wesbank but selected African Bank by accident. I lost my slip proving payment. The Manager at FNB helped very kindly and assisted by showing proof of payment as reflected on the statement. The query was logged again on 17 March and I was promised to be reimbursed by African Bank on the 23rd of the same month - the contact person was Moloko Kgobe. I never received my money, was never contacted and was told that the mandate didn't exist to contact customers with queries. I have a reference number #*** and am concerned as my debit orders are unpaid. The service is extremely poor at African Bank - I can't get joy and most importantly can't get my money back. How can I be assisted with the matter?