Wrongly Billed and shocking service

On 25 January I got an sms from Telkom billing saying I would be charged R2100 because I upgraded my contract. This is despite being informed my all Telkom consultants that I would not be charged any fee for upgrading and that I could only be charged for downgrading.<br> <br> I immediately lodged a case no: ***2 with customer care. I followed up with many calls to customer care who could only tell me that all they could do was email the person responsible at billing. They did this many times. To date nobody from billing has contacted me. Yesterday I phoned customer care again and was informed that billing closed my case on Feb 16. My case is still unresolved and nobody has contacted me.<br> <br> As a Telkom customer I have always kept my account in order and been a loyal customer who has paid tens of thousands of rands for services. <br> <br> Surely I deserve better treatment than this!