Pathetic service

I have 24 months 3G contract with MTN and always carefully watch my daily data usage. On 2nd and 3rd of August they shown ridiculous amount of data used so I call their Call center to investigate, but consultants cannot even understand what is going on, nevertheless to sort it out..On 6 August I went to MTN Head Office, spoke to consultant and been told to come again 11 August. Came back 11 August, eventually met lady from accounts department who wrote everything down and said they will email me full investigative report by 14 August, today is 19 August and I haven't received anything from them. Numerous times I asked MTN to email me Invoices and statements instead to post it - still no response.<br> Ridiculous, pathetic service!!!