i haven't received my monthly minutes

I have been in contract with Mtn for 8 years and i have been receiving my data and minutes on the 14th of each month, but this time around on the 14/12/15 i only received my 4Gdata & 30sms's but no minutes 100 minutes.<br> <br> when i called the call center on the 16th they said the issue was going to be resolved within 2 to 24 hours but i haven't received anything. my reference is ***. Today i called again and the lady was rude telling me that my minutes were given to me. Im sick and tired of this because i haven't received anything whereas the debit went through month end.<br> <br> Goodbye MTN & your terrible service<br>