MTN Billing Issue

Absolutely appalled with MTN South Africa and their billings department. I was billed 3 times in February for insurance. I have been trying to have this situation corrected since 25.02.20 with no success. Each time I am in contact with MTN to have this issue resolved, I am either directed to another department or given a useless reference number. It is now a month later and I am still being told that "they" are working to resolve the issue. This incompetence in fixing an error made by MTN is pathetic.