No response from MTN despite emails and calls

I have called many times and sent MTN numerous emails regarding a billing problem on my account.<br> I have not received feedback, nor has the issue been resolved and I am still being double billed with no credit from MTN for the double billing.<br> <br> All I want is for a decent response from MTN and the issue to be resolved.<br> Why must I complain before I get any service?<br> Poor form MTN!<br>