Poor handeling of customer query / Poor customer s

I have a cellphone account with MTN. My account was blocked at the end of October. Upon enquiring about this, I was told that I exceeded my call limit. I queried what seemed to be an unusually high bill but was told it could only be dealt with after 11 November. I followed up after the said date and we agreed that MTN would investigate the matter and let me know what happened. I was surprised when my account was suspended again without MTN contacting me to discuss the outcome of the investigation. On 29 November I contacted the call centre who were unable to assist me and requested that I call again the following day which I did. No body answered my call the whole day until I went to the MTN service centre in Morningside. I arrived there at 16h30 (30 minutes) before the closing time but was denied entry with an explanation that the centre was closed. I requested to see the management but was told there was no manager as they had left by 16h00. <br> <br> I am disappointed first by the incorrect bill and even more by how has been handled which I consider as poor customer service. I need MTN to contact me at *** or *** to reach an agreement on how to address this.