MTN POOR CUSTOMER SERVICE

Mtn double billed me incorrectly in Oct. I have been quering this issue since November. I have provided bank statements to verify I paid for July, Aug and Sept but at times their responses vary from no credit due to we changed systems and you were incorrectly billed twice for July. I was being helped by a very understanding and apologetic lady who informed she was liasing with the area managers etc but more than a month later she ignores my calls and when does answer she promises her manager will call me or she hasnt had a response etc. The call centre dnt bother to read the bank statements attached and give out ridiculous responses. Been a customer for more than 12 years. Upgraded in Nov, wish I hadnt. Will be leaving this network as soon as possible. Taking this complaint to the Ombudsman now. Furious at the poor customer service levels. Once your bank account is debitted its a case of too bad we dont care.