Xmas suprise Bill

My Telkom bill was stuck in my spam folder and when I saw it this morning I received a Xmas Surprise, When applying for My Telkom ADSL line (Was finally installed on the 13 Nov after battling with Telkom) I wanted to take the 4Mb line but the agent on the phone told me that there wasn't enough ports available and I can only get a 2Mb line. Agreeing to take 2Mb line the agent told me that She made the change on the system but on my bill I'm getting charged for a 4Mb Line... Not happy with Telkom I have a 12 Month ADSL contract with them but having this issues within the 1 Month is unacceptable I would rather then Cancel the contract and then Just Pay for the Line rental as I'm not even using their ADSL account on the Router. <br> I expected a Bill for R 927 (R354.00 - Fast ADSL Package (2Mb) + Line rental and R573 Line installation (Service Fee)) but they sent me a bill for R1,650 ???