Leaves clients stranded in other countries

I recently arrived in Australia only to find that international roaming is not working/enabled after having had it enabled for at least the last 6 years. Trying to get hold of MTN whilst in another country is near impossible. I logged a call with MTN customer service 3 days ago via the customer Service email address and they still haven't gotten back to me. My wife has tried speaking with them as there is no way to call them and they refuse to transfer her through to a manager! What on earth is the point of a supervisor/manager at MTN then? Instead I must sit in another country with no way to call and unable to do Internet banking as I can't get my one time pins. Great caring for your customer MTN. Perhaps I should take up the Cell C contract buy out offer...