MTN is *****ing minutes

I have laid several complaints to MTN and to date nothing has happened. I have a contract with MTN which entitles me to a 100 free minutes. In April 2015 I made calls equivalent to 10 minutes, and thank you to the technology of the phones I could calculate the minutes, but after the 10 minutes I was told I am out of free minutes.I laid a complaint with the call centre and till today I have not received a response. In June and July I did not use all my minutes and the same thing happened. In November the same happened and I laid a complaint at the branch in Durbanville. I am still waiting on the response. Its January and on the 20th I got my free minutes but by the 24th I was out of free minutes and I can state with cer*****y again that I did not use them.<br> <br> I am of the opinion that MTN is *****ing minutes to Increase its revenues. They are not keeping part of their promise as agreed in the contract.