International Roaming Not Activated

I needed my international roaming restored to what it was before I upgraded my contracts (x4) in May 15. The absolute lack of concern and unwillingness to assist is unimaginable. I am stationed in Angola and effectively stranded since the 8th of June as my clients/prospective clients cannot get hold of me. Not to mention that I am unable to receive any passwords for online banking etc. Despite various emails emails and attempts by my wife in SA to have this escalated, I simply get told that \It is out of their hands..."None of my emails are answered anymore despite the fact that I can see that they have been opened! This is completely unacceptable. There is no way that MTN can be contacted whist abroad! <br> <br> What can I do? Who can help?"""