Unresolved Billing Dispute and Poor Service

I am very disappointed with MTN’s poor handling of my September invoice dispute (Case BO***). The issue is about unfair cancellation charges, even though MTN could not provide proper network coverage in my area. I’ve sent several emails and follow-ups, yet MTN has not responded within their promised time frame or provided any meaningful update. This level of service is unacceptable for such a large company. I expect MTN to take responsibility and resolve this matter urgently and fairly.