Free minutes dissapearing....

To whom it may concern,

I have had a contract with mtn for the last 4years. A couple of days ago i had to load airtime to my phone because the free minutes i have doesnt allow me to use some functions like banking activations. I have noticed this in the past which is pretty ****py but never really bothered me. A couple of days ago i had to load R10 airtime to activate my new bank card. Today suddenly the R10 ran out and it seems i have lost all my remaining free minutes. I tried to query this but to no one suprise it is IMPOSSIBLE to speak to a MTN call centre agent to find out what has happned to my remaining free mintes. In the 4 years i have had this contract i have NEVER run out of free minutes. I find this totaly unacceptable! I would like a full call history statement so i can see exactly where my free mintes went to! If for some or other reason i did use up my free minutes i would like to see the statement proving this. I expect a call back from you asap as i need to be able to make phone calls for business.

Thank you