Data *****s

I went from contract to prepaid, while i was on contract a paid additional data. I was transferred 3 x times to different departments. The prepaid lady was so *********** that she wanted to transfer me to the contracts division, I was told that because i went from contract to prepaid, i forfeited my data, that is bull**** if i paid additional data that is data that does not belong to MTN as i paid for it. Very unhappy with this i am now looking to cancel all of my contracts with MTN