Horrible service i hate mtn

<p>Contacted mtn suppprt center inquiry about my airtime i had R109 airtime available and consultant told me its appication ruinning pn my phone i fail to understand because im still have Data how can airtime just disappear. A manager was unable to assist me. They are helpless i was on a call for more than 35 all they can say is we will contact you back. Im frustrated because this is not the first time this is happening i wanted to settle my contract n switch to other network provide and they informed me that if i do so i will loose mu number. What kind of service is that because i have been using this number for more than 10 years. Mtn really sucks</p>