Call centre answering time and service

I am currently living overseas and and am trying to cancel my 3 G contract. My dad has power of attorney on my affairs and was told he cannot do it on my behalf. Over the past 2 days, I have spent over 2 hours trying to get through to the call centre - ***. I have had to listen to the same line of music for the entire duration of my calls! Very disheartening and frustrating - and will definitely make me reconsider which service provider I use when I move home! Such terrible customer service that it makes me wonder if mtn benefits financially from the call waiting time!