Lost airtime

Have been querying R181 airtime that got lost on the 17th October 2015. I queried this with MTN and been sent from pillar to post. One of consultants or first consultant rather confirmed that I had R181 in my account an has disappeared. I called 7 days later no response then 2 weeks later called and this time they had to re log my query. Today when I visited a branch in Canal walk was advised that its after 30 days. I am disgusted with this response, this is my money and have been a loyal customer of MTN since Feb 1998 and this is the treatment. I want my airtime then I will cancel my contracts. This is day light ******* and its notnthe first time. One lady sent me an email advising that someone will call me, when I responded after 2 weeks to her email she asked me for my phone number which was kind of sarcastic as firly she had ref number secondly she never called until today. I wantnthis matter resolved as soon as possible. Howard at your Canal walk branch was very helpful.