MTN no use complaining they don't care

I am in charge of my companies cell phone contracts and as luck would have it i have MTN as a supplier, i have also been very fortunate to have been a Nashua Mobile customer that was moved to MTN. Since the move i have been trying to contact someone any one at the amazing company called MTN with no luck, i have called to either be cut off immediately or other days stay on the phone for over an hour and then get cut off. i have tried emailing but that just gets ignored. i have tried everything with no luck awesome customer service keep it up. now we get crazy deductions taken off our account and still nothing from this joke of a company. can some one from the Organisation contact me regarding our account, even better the person given the account would be great if they called introduced themselves as our account manager and maybe just maybe do their job as they are suppose to. next step put stop orders on MTN and contact the ombudsman as this company does and charges as they feel like.