Termination - refund

I've terminated my account with MTN early June 2019. I have a credit on my account, which MTN committed to refund within 7 working days. Now, almost 4 months later, after numerous e-mails, I still have not received my refund. Absolutely terrible!!

Refer to history below: Date Action 26-Se**** No feedback received. Follow up e-mail. 23-Se**** Refund not received. Follow up e-mail. 18-Se**** The POP was submitted to BANKING as of last month but till to date it hasn't been actioned we escalated again to their supervisor/line manager and will give feedback, ASAP. 18-Se**** Further communication re dissatisfaction. 13-Se**** Refund not received. Follow up e-mail. 7-Se**** Escalated to banking management and is taking priority. 4-Se**** No feedback received. Follow up e-mail. 30-Aug-19 Refund not received. Follow up e-mail. 21-Aug-19 I have escalated to our banking department, they required the proof of payment which I have sent to them. 19-Aug-19 Refund not received. Follow up e-mail. 6-Aug-19 Logged a refund request ref# ***. Money will be refunded within 7 working days. 1-Aug-19 July statement reflects credit 31-Jul-19 Forwarded to EBU 30-Jul-19 No feedback received. Follow up e-mail. 26-Jul-19 No feedback received. Follow up e-mail. 22-Jul-19 No feedback received. Follow up e-mail. 16-Jul-19 No feedback received. Follow up e-mail. 10-Jul-19 No feedback received. Follow up e-mail. 5-Jul-19 No feedback received. Follow up e-mail. 3-Jul-19 Contract fee decucted from bank account after termination. 18-Jun-19 Early termination paid. Proof submitted. 11-Jun-19 Early termination quotation provided.