MTN refusing to cancel

I have an issue with the retention department, I have requested a settlement quote in June and we are approaching end of August now and heading to September. The saddest part they will flag me on Credit bureau for non payment as I have sent them several emails and calls without assistance. Hello Peter is my last resort as my plea is falling on deaf ears at MTN, spoke to Mark Nkohla he left me hanging when requested the banking details as he was the only one who sent the email after the call. The others kept promising the settlement quote "early cancellation" as they call it. Hopefully by using this platform my case will be taken seriously as the next step will be ombudsman, because it's my legal right to cancel whenever I want.