MTN is lacking on service champion skills for roaming

I have spoken to at least 3 service champions since 5 March to have my international roaming activated. I am now abroad and the best I have received is waiting over 15 minutes on each call with empty promises. Now I have to rely on free WiFi to access internet after being a loyal MTN customer for 16 years. Yesterday I asked my wife to try to intervene by calling 135 on my behalf and she got the worst customer experience and being told we cannot assist you if you are not the owner of the line despite being an MTN client with access to my personal details they all require. Will a real service champion please stand up! 1st reference number on the 5th - smc/***