Over billed

Hi there

I was speaking to Samantha from Telkom who was lovely at assisting me, the problem I am having is that I have been over billed by Telkom by double as I was supposed to pay roughly R1600 and my bill for the month is on a whopping R3 200.00. I went in to Telkom to confirm the odd amounts on my bill that I am unaware of and they told me that they themselves did not know why it was like that and that I had to call the billing department. I have gotten through to the billing department and all that was basically told to me is that it is on my bill so I am liable to pay it. No investigation was done and I am perturbed, as I am a loyal customer to Telkom with about 4 contracts with them. Please assist me as this is effecting me in a negative way, thanking you in this regard. FYI I came on to the live chat facility and was dropped at least 4 times before Samantha spoke to me.