*** ****** by MTN: Airtime disappeared

How does this happen? I am on a TopUp 200 contract and receive R200 each month. I usually let my airtime accumulate between months to enjoy longer calls. Last week I started to notice that my airtime disappeared rapidly from R400 to R9 to R0. Number: ***. Check - WHERE IS MY AIRTIME?<br> <br> How is this possible? I the phone MTN 808 and the calm representative logged a request with the Networks Department. <br> <br> Today I called again to find out what MTN was scheming again (18/3/2015). I was assisted by a young girl who was unsure about almost everything, she called me a Sir and also very impatient! What is happening to your once \Ayoba"Service? This is not the way it is supposed to be... After speaking to the *********** representative I demanded to speak to a Supervisor. I was placed on hold for a long time in utter silence"