INTERNATIONAL ROAMING

My cellphone contract was with Nashua Mobile but when they closed they transferred my contract to MTN. I upgraded in January 2015 Dylan at George Square branch assisted me promised that as I had roaming on my old contract it will be activated on new one as well. I travel abroad once a month and need my phone when I am abroad - I phoned MTN customer services twice before I left to make sure I have roaming on my phone, now I am in Japan without a phone service. I made two very expensive calls from somebody elses phone to MTN customer care in South Africa, once was told to take out the sim card and then put it back and the phone will work, once told it will be activated in an hour or two. After a couple of more hours I phoned the George branch was told Dylan does not work there anymore and that roaming was not activated on my phone and cant be done while I am abroad, will have to go without it until I get back to South Africa! This is not good enough - I want my phone working now - not first have to return to SA to hear more lies! Why was I first told by 3 different people it is on must just be activated, now cant be done until I return! The worse service ever !!