Lack of service

I have been, or at least my husband has had this contract since Nashua mobile days. Since MTN took over as provider, I have been battling to get helpful service. Yes, the account is on my husbands name, but I have full power of attorney on the account since before 2014.( in means of a letter and again telephonicallt with a supervisor) Mtn has assured me that my ID number and answering of certain security questions will suffice when contacting the 808 number. After some struggles, we were given an MTN secure code to use.... but low and behold.... I'm still not allowed to phone. I have recently done an upgrade on 'our ' package .... which I now regret. I just have a question regarding data! I'm not trying to ***** anything. Come'on MTN this is really ridiculous and pathetic service. I've been waiting for a supervisor to phone me since 8 this morning.... when I phoned now.... they said this manager is out and I should try again after 13h30. Is there no one that can take charge in cases like these? I would like someone to call me as a matter of urgency to try and retain a loyal MTN client.